[Bug target/89877] [ARC] miscompilation due to missing cc clobber in longlong.h: add_ssaaaa()/sub_ddmmss()

[claziss at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89877

--- Comment #4 from Claudiu Zissulescu <claziss at gmail dot com> ---
Backported to gcc 8 branch revision 270200.