From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id E5EF63858430; Thu, 21 Apr 2022 16:49:12 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org E5EF63858430 From: "jakub at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/105337] [12 Regression] wrong code at -Os and above on x86_64-linux-gnu Date: Thu, 21 Apr 2022 16:49:12 +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: unknown X-Bugzilla-Keywords: wrong-code X-Bugzilla-Severity: normal X-Bugzilla-Who: jakub at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 12.0 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: 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 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 21 Apr 2022 16:49:13 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105337 --- Comment #5 from Jakub Jelinek --- printf isn't really needed. This fails even with -O2, doesn't with -O1 or = -O0: __attribute__((noipa)) void bar (int x) { (void) x; } int a; int foo (void) { int b, c; for (b =3D 0; b < 3; b++) { if (!a) break; c--; bar (c); } return b; } int main () { if (foo ()) __builtin_abort (); return 0; }=