From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 1B6EF38582A1; Tue, 23 Jan 2024 13:12:10 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 1B6EF38582A1 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1706015530; bh=cEQgyHjl2S7iyXSvI7qM+MSois4PovLz6j5AUkbs7Cw=; h=From:To:Subject:Date:In-Reply-To:References:From; b=NZTQZTjio2tzd7xk2mu2Gsq5b3RMOikbT9ICTdbAy5B53FzMd6rHwdDQE+ALnbMKy cPp6UZ1nHwyIX9LcJA9F4BOopCy7I9PRvErWaIWoM0ILNkG08eOb9+iTsUKq3GDUer xrr4GyKeQipSq/hYb9jZEM4ZTxEKpxEV4W6+MMhc= From: "tnfchris at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/113441] [14 Regression] Fail to fold the last element with multiple loop Date: Tue, 23 Jan 2024 13:12:09 +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: missed-optimization, needs-bisection X-Bugzilla-Severity: normal X-Bugzilla-Who: tnfchris at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 14.0 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 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113441 --- Comment #23 from Tamar Christina --- tamar:~/gcc-dsg/test$ extract-toolchain gcc 2efe3a7de01 A 1514 files D 0 files M 0 files Extracted 'origin/manygcc-basepoints-gcc-14-6292-g2f512f6fcdd:2efe3a7de01' > ./bin/gcc -S -o ../wlo-bad.s -march=3Darmv8-a+sve -O3 -msve-vector-bits= =3D512 -fno-vect-cost-model -g0 ../wlo.c -fdump-tree-vect-all tamar:~/gcc-dsg/test$ extract-toolchain gcc 9f7ad5eff3b A 1514 files D 0 files M 0 files Extracted 'origin/manygcc-basepoints-gcc-14-6292-g2f512f6fcdd:9f7ad5eff3b' > ./bin/gcc -S -o ../wlo-good.s -march=3Darmv8-a+sve -O3 -msve-vector-bits= =3D512 -fno-vect-cost-model -g0 ../wlo.c -fdump-tree-vect-all > diff ../wlo-bad.s ../wlo-good.s | wc -l 537 and for the record the bisect was scanning for "requires scalar epilogue l= oop" and that's the first commit they appear on.=