[Bug target/82158] _Noreturn functions that do return clobber caller's registers on ARM32 (but not other arches)

[joseph at codesourcery dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82158

--- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot 
com> ---
Falling off a noreturn function sounds like it could be another case to 
insert __builtin_trap (), as we do in various cases of undefined behavior.