[Bug target/110812] Check availability of builtins at expand time

[schwab--- via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110812

--- Comment #13 from Andreas Schwab <sch...@linux-m68k.org> ---
$ lto-dump -list vector.o 
lto-dump: fatal error: target specific builtin not available
compilation terminated.