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From: "antoshkka at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/19661] unnecessary atexit calls emitted for
 static objects with empty destructors
Date: Fri, 24 Sep 2021 07:41:50 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D19661

--- Comment #10 from Antony Polukhin <antoshkka at gmail dot com> ---
Any progress?

Multiple compilers already eliminate the atexit call. Moreover, some of the
compilers even eliminate the guard variable after that=20
https://godbolt.org/z/dbdfMrroa

Note that the atexit elimination would benefit the libstdc++, as the latter=
 now
uses a bunch of constant_init instances that have empty destructor
in libstdc++-v3/src/c++17/memory_resource.cc and
libstdc++-v3/src/c++11/system_error.cc . It would be possible to eliminate =
the
atexit calls for those cases and speedup startup times
https://godbolt.org/z/MKaWKevzq=