[Bug sanitizer/58413] ubsan constant folding

[mpolacek at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58413
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
A patch that hopefully fixes the integer constant expression issues posted:
http://gcc.gnu.org/ml/gcc-patches/2013-09/msg01057.html