From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
 id 4BB883858409; Thu, 26 Aug 2021 06:26:18 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 4BB883858409
From: "linkw at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/102059] Incorrect always_inline diagnostic in LTO mode with
 #pragma GCC target("cpu=power10")
Date: Thu, 26 Aug 2021 06:26:17 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: ipa
X-Bugzilla-Version: 11.2.1
X-Bugzilla-Keywords: diagnostic, lto, rejects-valid
X-Bugzilla-Severity: normal
X-Bugzilla-Who: linkw at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: linkw at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-102059-4-8Ntb5XanE9@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-102059-4@http.gcc.gnu.org/bugzilla/>
References: <bug-102059-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-BeenThere: gcc-bugs@gcc.gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Gcc-bugs mailing list <gcc-bugs.gcc.gnu.org>
List-Unsubscribe: <https://gcc.gnu.org/mailman/options/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-request@gcc.gnu.org?subject=help>
List-Subscribe: <https://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Thu, 26 Aug 2021 06:26:18 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102059

--- Comment #9 from Kewen Lin <linkw at gcc dot gnu.org> ---
One more reduced test case:

fail cmd: gcc -c -O2 -flto -mcpu=3Dpower8
pass cmd: gcc -c -O2 -flto -mcpu=3Dpower8 -mno-htm -mno-power8-fusion

----------------------
__attribute__((always_inline)) int foo(int *b) {
  *b +=3D 10;
  return *b;
}

#pragma GCC target "cpu=3Dpower10"
int bar(int* a){
  *a =3D foo(a);
  return 0;
}

----------------------

I confirm the mismatch subset on HTM is expected, ISA 3.1 has removed the
transnational memory support.  As to OPTION_MASK_P8_FUSION, it's reasonable=
 to
exclude it from ISA3.0 (power9), but I'm not sure if it's not a subset of
Power10 new fusion, from the current implementation it isn't.

Hi @Mike, could you help to confirm this?=