[Bug bootstrap/57438] bootstrap fails on x86_64 darwin in stage2 linking cc1

[iains at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57438

--- Comment #27 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Uroš Bizjak from comment #26)
> +      /* If we don't find any, we've got an empty function body; i.e.
> +	 completely empty - without a return or branch.  Reaching an
> +	 empty function body means UB.  Let's trap it.  */
> +      if (insn == NULL)
> +	fputs ("\thlt\n", file);
> 
> Probably sou want to use ud2 instruction here.

yeah, hlt is a little drastic ;-)