[Bug tree-optimization/50337] -ftree-dse performs wrong elimination on electric-fence

[cjwatson at ubuntu dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50337

--- Comment #1 from Colin Watson <cjwatson at ubuntu dot com> 2011-09-08 17:06:08 UTC ---
Created attachment 25232
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25232
test case