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 1707A3857C4F; Tue,  2 Apr 2024 15:56:56 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 1707A3857C4F
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1712073417;
	bh=nJSX6LQxLovrtGADWzVhZ7iwYLxPcw9TS3oFbOBPFCM=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=kG1Zf/1C+CDwRuTOfi6fvFrdfcvz6hDbjh2Rq6Ddxw6gH5oDflnU8ECTKHxUWv1nB
	 OhnXbKMagR0n3xgfMlD2apxeemXEfqr2iaV0UnKPyVXgN2BSLN6rknMpfFhdKQzB9w
	 14wR3GvzU6H93HtO8w8utJrEk5Ty0lQiNF19TaQE=
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/111407] [11/12/13 Regression] ICE: SSA
 corruption due to widening_mul opt on conflict across an abnormal edge
Date: Tue, 02 Apr 2024 15:56:56 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: ice-checking, ice-on-valid-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: cvs-commit at gcc dot gnu.org
X-Bugzilla-Status: NEW
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: qinzhao at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 11.5
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-111407-4-aIrzOX5HBl@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-111407-4@http.gcc.gnu.org/bugzilla/>
References: <bug-111407-4@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
List-Id: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111407

--- Comment #15 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-12 branch has been updated by Qing Zhao <qinzhao@gcc.gnu.o=
rg>:

https://gcc.gnu.org/g:5f23f9f141c4b52e8f4a9aadc88b8155cf1959a3

commit r12-10306-g5f23f9f141c4b52e8f4a9aadc88b8155cf1959a3
Author: Qing Zhao <qing.zhao@oracle.com>
Date:   Thu Feb 29 15:07:49 2024 +0000

    Fix SSA corruption due to widening_mul opt on conflict across an abnorm=
al
edge [PR111407]

    This is a bug in tree-ssa-math-opts.cc, when applying the widening mul
    optimization, the compiler needs to check whether the operand is in a
    ABNORMAL PHI, if YES, we should avoid the transformation.

            PR tree-optimization/111407

    gcc/ChangeLog:

            * tree-ssa-math-opts.cc (convert_mult_to_widen): Avoid the
transform
            when one of the operands is subject to abnormal coalescing.

    gcc/testsuite/ChangeLog:

            * gcc.dg/pr111407.c: New test.

    (cherry picked from commit 4aca1cfd6235090e48a53dab734437740671bbf3)=