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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/104719] Use of `std::move` in libstdc++ leads to
 worsened debug performance
Date: Mon, 28 Feb 2022 16:50:29 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104719

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Vittorio Romeo from comment #0)
> Would it be possible to replace `std::move` calls internal to `libstdc++`
> with a cast,

No, absolutely not.

> or some sort of compiler intrinsic?

No, but the compiler could just fold it away (see PR 96780).

> Or maybe mark `std::move`
> as "always inline" even without optimizations enabled?=20

Maybe, although since your benchmark shows there is no problem with GCC at =
-Og
I think this is a Clang problem, not libstdc++ or libc++.=