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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/51663] Desirable/undesirable elimination of unused
 variables & functions at -O0, -O0 -flto and -O0 -fwhole-program
Date: Tue, 17 Mar 2020 12:18:27 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D51663

--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #13)
> F.i., an open question for me is the following: I'm now using
> -flto-partition=3Dnone for testing, but maybe 1to1 should yield better re=
sults?

I guess it better mimics how the testcases are set up, but I think the
differences will be due to the other issues so the exact partitioning
shouldn't matter (you likely always get a single partition and thus
behavior equal to -flto-partition=3Dnone or -flto-partition=3Done by defaul=
t).
-flto-partition=3Dnone will be faster because it elides the LTRANS IL strea=
ming.=