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From: "envia at envia dot pe.kr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/111660] [14 Regression] Compilation of constexpr function
 returning enum takes exponential time with -std=c++2a
Date: Mon, 02 Oct 2023 01:39:42 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111660

--- Comment #9 from Hwang Joonhyung <envia at envia dot pe.kr> ---
(In reply to Andrew Pinski from comment #6)
> (In reply to Hwang Joonhyung from comment #0)
> > It took more than 30 minutes when I compiled testcase.cc with g++ 14.0.0
> > 20231001 on Debian GNU/Linux 12 with -std=3Dgnu++2a (or gnu++20, c++2a,=
 c++20).
> > I guess it is a regression because it finishes within 0.1 second with g=
++
> > 13.2.0 or 12.3.0.
> > The testcase is based on GetOneCharToken() of V8.
>=20
> Does -fno-checking solve the performance issue?

No. It took almost the same time. I used -std=3Dgnu++2a -fno-checking.=