https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84229
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |accepts-invalid
CC| |mpolacek at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Component|ipa |c
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Huh, __builtin_va_arg_pack_len is only valid within varargs functions. The
difference seems to be that without LTO we simply emit a library call and
not emit aa.i:open (which is invalid) but with LTO we inline the call
and thus end up trying to expand the builtin.
So it's rather a accepts-invalid without LTO ;)
Or LTO misbehaving in not throwing away extern inline functions that are not
used within TU boundaries... Honza - any opinion on that?
Marek, can we somehow error from the FE if __builtin_va_arg_pack[_len] is
used in a non-varargs function?
