[Bug middle-end/61045] [4.7/4.8/4.9/4.10 Regression] Wrong constant folding

[mpolacek at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61045

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I believe this started with addition of this folding in r117931, but didn't
verify it.