From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id ED01CC79FAD for ; Wed, 9 Sep 2026 11:12:18 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1x4GDM-0004d0-CF; Wed, 09 Sep 2026 07:11:40 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1x4GDK-0004cS-A0 for qemu-devel@nongnu.org; Wed, 09 Sep 2026 07:11:38 -0400 Received: from rev.ng ([94.130.142.21]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1x4GDI-0006mU-IH for qemu-devel@nongnu.org; Wed, 09 Sep 2026 07:11:38 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=rev.ng; s=dkim; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References: In-Reply-To:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive:List-Unsubscribe:List-Unsubscribe-Post: List-Help; bh=OMjZDX6rKwzBgAXL6s7+DESo+/QiwsVkvLwytKyvofU=; b=i3N8hbUwjiKNwhv YUz4VqCCKh0XenUoT+T2aTVBGj4dfrTLnNSHtKJIlrX+xEXXglMzayUJ07xBIsbX+gZQiOkVSEJOA xPd8L9mHWkrS8zPoeEtKAMpEXM7RrFMG+7OTTy4NTEnF1ux0cHJg7P1vx1CdkAGU1aIL3OVnGiN12 io=; Date: Wed, 9 Sep 2026 13:09:07 +0200 To: Anton Johansson Cc: qemu-devel@nongnu.org, brian.cain@oss.qualcomm.com, pierrick.bouvier@oss.qualcomm.com, philmd@mailo.com Subject: Re: [PATCH v2 19/50] helper-to-tcg: Pipeline, run optimization pass Message-ID: <20260909130907.4955f7bb@spawn> In-Reply-To: <20260730031025.12926-20-anjo@rev.ng> References: <20260730031025.12926-1-anjo@rev.ng> <20260730031025.12926-20-anjo@rev.ng> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=94.130.142.21; envelope-from=ale@rev.ng; helo=rev.ng X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-to: Alessandro Di Federico From: Alessandro Di Federico via qemu development Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Thu, 30 Jul 2026 05:09:53 +0200 Anton Johansson wrote: > Run a standard LLVM -Oz optimization pass, which makes up the bulk of > optimizations in helper-to-tcg. > > Signed-off-by: Anton Johansson > --- > subprojects/helper-to-tcg/src/Pipeline.cpp | 12 ++++++++++++ > 1 file changed, 12 insertions(+) > > diff --git a/subprojects/helper-to-tcg/src/Pipeline.cpp b/subprojects/helper-to-tcg/src/Pipeline.cpp > index a11c5fd353..571276de24 100644 > --- a/subprojects/helper-to-tcg/src/Pipeline.cpp > +++ b/subprojects/helper-to-tcg/src/Pipeline.cpp > @@ -202,5 +202,17 @@ int main(int argc, char **argv) { > MPM.addPass(createModuleToFunctionPassAdaptor(std::move(FPM))); > } > > + // > + // Run a -Oz optimization pass. In general -Oz will prefer loop > + // vectorization over unrolling, as compared to -O3. In TCG, this > + // translates to more utilization of gvec and possibly smaller TBs. > + // > + > + // Optimization passes > + MPM.addPass(PB.buildModuleSimplificationPipeline( > + compat::OptimizationLevel::Oz, compat::LTOPhase)); > + MPM.addPass( > + PB.buildModuleOptimizationPipeline(compat::OptimizationLevel::Oz, {})); > + > return 0; > } > -- > 2.52.0 Reviewed-by: Alessandro Di Federico -- Alessandro Di Federico rev.ng Labs