[Bug middle-end/77928] Add __builtin_iseqsig

[burnus at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77928

--- Comment #2 from Tobias Burnus <burnus at gcc dot gnu.org> ---
Submitted patch:
  https://gcc.gnu.org/pipermail/gcc-patches/2022-September/600840.html