[Bug c/53968] integer undefined behaviors in GCC

[regehr at cs dot utah.edu]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53968

--- Comment #1 from John Regehr <regehr at cs dot utah.edu> 2012-07-14 22:53:06 UTC ---
Also there are about 50 defects relating to C99's restrictive rules for
left-shifts of signed integers.  I have omitted them since people typically
don't care to fix these.  If anyone wants to see them, let me know.