[Bug tree-optimization/59715] [4.7/4.8/4.9 Regression] wrong code at -Os and above on x86_64-linux-gnu

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59715

--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 31775
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31775&action=edit
alternative patch

Alternative patch splitting critical edges again.  I'm going to test that, it
fixes optimization regressions from at least 4.3 where critical edges were
still
split reliably.