From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 4E56B38560B7; Tue, 13 Sep 2022 05:16:00 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 4E56B38560B7 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1663046160; bh=lJplQCh481cEFVulCtj0NT6UDkKKqg+yF2xrjn6yb+4=; h=From:To:Subject:Date:In-Reply-To:References:From; b=iLpCn+D7PdyI7SAjEfI/DnWhF03GweSsQxtCAEcGe9jGseORqmtZESxTAq76T7SZs gpgDuyuqjZ3sinTRs/VDMousVT1gMSuQ8Hwac7eZ51VBHcEGO+P81zqWD+FUs5Fmep tEJ0rJVtvM22DsQ9Q7b7udaV9bGL7vsqiay6eHwE= From: "crazylht at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/106905] [13 Regression] ia64: ICE in in vect_peel_nonlinear_iv_init, at tree-vect-loop.cc:8412 on zstd-1.5.2 since r13-2503-gc13223b790bbc5 Date: Tue, 13 Sep 2022 05:16:00 +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: 13.0 X-Bugzilla-Keywords: ice-on-valid-code X-Bugzilla-Severity: normal X-Bugzilla-Who: crazylht at gmail dot com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 13.0 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=3D106905 --- Comment #3 from Hongtao.liu --- in vectorizable_nonlinear_induction, we prevent variable peeling by only checking LOOP_VINFO_MASK_SKIP_NITERS (loop_vinfo). But when "!vect_use_loop_mask_for_alignment_p (loop_vinfo) && LOOP_VINFO_PEELING_FOR_ALIGNMENT (loop_vinfo) < 0", vectorizer will also do variable peeling for epilog, and it hits gcc_assert in vect_peel_nonlinear_iv_init. I'm testing diff --git a/gcc/tree-vect-loop.cc b/gcc/tree-vect-loop.cc index 8f88f1755be..9c434b66c5b 100644 --- a/gcc/tree-vect-loop.cc +++ b/gcc/tree-vect-loop.cc @@ -8646,8 +8646,10 @@ vectorizable_nonlinear_induction (loop_vec_info loop_vinfo, /* Also doens't support peel for neg when niter is variable. ??? generate something like niter_expr & 1 ? init_expr : -init_expr? = */ niters_skip =3D LOOP_VINFO_MASK_SKIP_NITERS (loop_vinfo); - if (niters_skip !=3D NULL_TREE - && TREE_CODE (niters_skip) !=3D INTEGER_CST) + if ((niters_skip !=3D NULL_TREE + && TREE_CODE (niters_skip) !=3D INTEGER_CST) + || (!vect_use_loop_mask_for_alignment_p (loop_vinfo) + && LOOP_VINFO_PEELING_FOR_ALIGNMENT (loop_vinfo) < 0)) { if (dump_enabled_p ()) dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,=