From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 1666) id A4D4B3857703; Mon, 16 Oct 2023 12:49:20 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org A4D4B3857703 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1697460560; bh=thRNeJpZZHoD/j+gcAA7meZVj2A5igbKSrEg0d8Ty4I=; h=From:To:Subject:Date:From; b=CVti9odOvSuDiS8/wqK28bMe9/u5T64EbJEyOAUonqlqEN6CqH4jVsvAx6UZlA7sS tuOFEYzQo9nS0yUhUFARREP1jKkMAAsYeJPB/QO04RZ6pkpiFXp7JI1P/kCzx9Btrs xJmaJrT96zBQmprbC4hmStvs7VEJ0dqQd4EgayXg= Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: Richard Biener To: gcc-cvs@gcc.gnu.org Subject: [gcc(refs/users/rguenth/heads/vect-force-slp)] Fail vectorization when not SLP with --param vect-force-slp=1 X-Act-Checkin: gcc X-Git-Author: Richard Biener X-Git-Refname: refs/users/rguenth/heads/vect-force-slp X-Git-Oldrev: e6d063086726ccb2c5219611319285099a628878 X-Git-Newrev: 8e15af61ade7bcd8239125904e02f3cfdc445e91 Message-Id: <20231016124920.A4D4B3857703@sourceware.org> Date: Mon, 16 Oct 2023 12:49:20 +0000 (GMT) List-Id: https://gcc.gnu.org/g:8e15af61ade7bcd8239125904e02f3cfdc445e91 commit 8e15af61ade7bcd8239125904e02f3cfdc445e91 Author: Richard Biener Date: Wed Aug 23 10:48:32 2023 +0200 Fail vectorization when not SLP with --param vect-force-slp=1 The following adds --param vect-force-slp allowing to indicate failure when not all stmts participating in loop vectorization are using SLP vectorization. This is intended for transitioning and debugging. Enabling this without further changes results in the following within vect.exp on x86_64 === g++ Summary === -# of expected passes 619 +# of expected passes 546 +# of unexpected failures 73 === gcc Summary === -# of expected passes 8835 -# of expected failures 256 +# of expected passes 7271 +# of unexpected failures 1564 +# of unexpected successes 12 +# of expected failures 244 === gfortran Summary === -# of expected passes 171 +# of expected passes 144 +# of unexpected failures 27 * params.opt (-param=vect-force-slp=): New, default to 0. * doc/invoke.texi (--param vect-force-slp): Document. * tree-vect-stmts.cc (vect_analyze_stmt): With --param vect-force-slp=1 fail vectorization when not using SLP. Diff: --- gcc/doc/invoke.texi | 4 ++++ gcc/params.opt | 4 ++++ gcc/tree-vect-stmts.cc | 6 ++++++ 3 files changed, 14 insertions(+) diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index eb714d18511d..092948600549 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -16297,6 +16297,10 @@ this parameter. The default value of this parameter is 50. @item vect-induction-float Enable loop vectorization of floating point inductions. +@item vect-force-slp +Fail vectorization when falling back to non-SLP. This is intended for +debugging only. + @item vrp-sparse-threshold Maximum number of basic blocks before VRP uses a sparse bitmap cache. diff --git a/gcc/params.opt b/gcc/params.opt index fffa8b1bc64d..ae2fa54fc589 100644 --- a/gcc/params.opt +++ b/gcc/params.opt @@ -1183,6 +1183,10 @@ The maximum factor which the loop vectorizer applies to the cost of statements i Common Joined UInteger Var(param_vect_induction_float) Init(1) IntegerRange(0, 1) Param Optimization Enable loop vectorization of floating point inductions. +-param=vect-force-slp= +Common Joined UInteger Var(param_vect_force_slp) Init(0) IntegerRange(0, 1) Param Optimization +Fail vectorization when falling back to non-SLP. + -param=vrp-sparse-threshold= Common Joined UInteger Var(param_vrp_sparse_threshold) Init(3000) Optimization Param Maximum number of basic blocks before VRP uses a sparse bitmap cache. diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc index b3a56498595d..527c333544d3 100644 --- a/gcc/tree-vect-stmts.cc +++ b/gcc/tree-vect-stmts.cc @@ -12751,6 +12751,12 @@ vect_analyze_stmt (vec_info *vinfo, return opt_result::success (); } + if (param_vect_force_slp && !node) + return opt_result::failure_at (stmt_info->stmt, + "not vectorized:" + " not part of SLP but SLP forced: %G", + stmt_info->stmt); + ok = true; if (!bb_vinfo && (STMT_VINFO_RELEVANT_P (stmt_info)