[Bug c/85962] spurious warning on right shift constant > integer in trivially dead code

[joshudson at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85962

--- Comment #1 from Joshua <joshudson at gmail dot com> ---
(first three lines is because you don't want bug reports with external header
files--3 lines is a lot better than all of stdint.h and limits.h)