[Bug sanitizer/80386] UBSAN: false positive - constant folding and reassosiation before instrumentation

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80386

--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Patch posted: <https://gcc.gnu.org/ml/gcc-patches/2017-05/msg00896.html>.