On 13 May 2015, at 17:05, Pedro Giffuni <p...@freebsd.org> wrote:
> I am looking at the cdefs in other BSDs hoping to avoid adopting the
> same definitions with incompatible names and I noticed NetBSD is using
> a new __builtin_unreachable (void) function from gcc 4.6:
> Apparently it was interesting enough that clang implemented it too so
> I created a code review differential for it.
> I don't want to add new C definitions unless they are going to be used
> so feel free to comment on the convenience or not of having it.
LLVM uses this quite heavily, in a macro that expands to something equivalent
to assert(0 && "unreachable reached!”) in debug mode and
__builtin_unreachable() in release mode. When you’re debugging, you get errors
if you reach unreachable code and in deployment the compiler gets a useful hint
email@example.com mailing list
To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"