[Bug rtl-optimization/21804] [3.4 only] gcc generates incorrect code on x86_64 with -O2

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
  GCC build triplet|x86_64-unknown-linux-gnu    |
   GCC host triplet|x86_64-unknown-linux-gnu    |
 GCC target triplet|x86_64-unknown-linux-gnu    |x86_64-linux-gnu
            Summary|gcc generates incorrect code|[3.4 only] gcc generates
                   |on x86_64 with -O2          |incorrect code on x86_64
                   |                            |with -O2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21804