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Date: Mon, 15 Feb 2021 16:32:23 +0100
From: Jan Hubicka <hubicka@ucw.cz>
To: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
Cc: gcc-bugs@gcc.gnu.org
Subject: Re: [Bug gcov-profile/99105] profile streaming scales poorly to
 projects with many source files
Message-ID: <20210215153223.GI44975@kam.mff.cuni.cz>
References: <bug-99105-4@http.gcc.gnu.org/bugzilla/>
 <bug-99105-4-a9vooYEkVQ@http.gcc.gnu.org/bugzilla/>
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> Ah, yeah, that will make a big difference.
> So clang is using 'make check', running a test-suite for a PGO build, right?
It uses 
make check-llvm
make check-clang
and then it rebuilds whole llvm with the instrumented compiler.

Honza