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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/104156] [12 Regression] -fcompare-debug
 failure with -O2 -funswitch-loops since r12-4526-gd8edfadfc7a9795b
Date: Mon, 24 Jan 2022 07:57:18 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104156

--- Comment #10 from rguenther at suse dot de <rguenther at suse dot de> ---
On Sat, 22 Jan 2022, cnsun at uwaterloo dot ca wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104156
>=20
> --- Comment #9 from Chengnian Sun <cnsun at uwaterloo dot ca> ---
> Thanks, Andrew.=20
>=20
> What about -flto? Does GCC still guarantee such a compilation consistency=
 wrt
> to debug info in the presence of -flto?

Yes, even with -flto we aim to produce the same code.  Note I'm not 100%
sure that -fcompare-debug works fine on the LTRANS level so you maybe
need to adjust to -flto-partiton=3Dnone.=