PR libgcc/71744
* unwind-dw2-fde.c (ATOMIC_FDE_FAST_PATH): Define if __register_frame*
is not the primary registry and atomics are available.
(any_objects_registered): New variable.
(__register_frame_info_bases, __register_frame_info_table_bases):
Atomically store 1 to any_objects_registered after registering first
unwind info.
(_Unwind_Find_FDE): Return early if any_objects_registered is 0.
From-SVN: r240193