[Bug rtl-optimization/15421] -O2 (and above) optimize away used variables resulting in 'undefined reference'

[dueffert at informatik dot hu-berlin dot de]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
   GCC host triplet|                            |x86
 GCC target triplet|                            |x86
      Known to fail|                            |3.4.0
      Known to work|                            |3.3.3


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15421