[Bug c/21420] [3.4/4.0/4.1 Regression] Accepts writting to const via asm

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[3.4/4.0/4.1 Regression]    |[3.4/4.0/4.1 Regression]
                   |                            |Accepts writting to const
                   |                            |via asm


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21420