[Bug tree-optimization/47392] [4.6 Regression] PRE opportunity no longer found

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47392

--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-01-21 
12:45:56 UTC ---
We could also always perform PRE when there is one insertion and one
elimination, assuming the size cost cancels.