From patchwork Mon Jul 9 16:38:16 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Richard Earnshaw (lists)" X-Patchwork-Id: 941453 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=gcc.gnu.org (client-ip=209.132.180.131; helo=sourceware.org; envelope-from=gcc-patches-return-481229-incoming=patchwork.ozlabs.org@gcc.gnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=gcc.gnu.org header.i=@gcc.gnu.org header.b="btZMWGfb"; dkim-atps=neutral Received: from sourceware.org (server1.sourceware.org [209.132.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 41PWJw2d3rz9s00 for ; Tue, 10 Jul 2018 02:40:00 +1000 (AEST) DomainKey-Signature: a=rsa-sha1; c=nofws; d=gcc.gnu.org; h=list-id :list-unsubscribe:list-archive:list-post:list-help:sender:from :to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-type; q=dns; s=default; b=yb8dEwPQnFFRxrFE UWvxfsclxT3QApV8TVzN4QGNN23omCQ2aWyMvbgbNP4MYZWX3s0fzo9FuHo1dJRJ +L+0YrvDYmur3mxLIdTZnEiCWi3ov4NUDr2GjPHg3V50EREAufeJjdnelPARWGcJ /7otPsSuaRcSuV0DaHf6LvMC5k4= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=gcc.gnu.org; h=list-id :list-unsubscribe:list-archive:list-post:list-help:sender:from :to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-type; s=default; bh=+YEQ2tHPw+ZsahyKU1Z2uN w2zvc=; b=btZMWGfbPj1u79gCzB233uBvWX2pet/JX3AcaXPaOLMqDS0tSNLnVA GQwMH7YIM1kL/MQuqAf4DlcfffT5YFsLuvuwuzGqHAYB70KBIyQorCczmMQiXnX2 px2SQcrb3fFH3D6kiTT83CV2FwICDYOtWuXY5R0l5M7+rihiJ3d6s= Received: (qmail 90343 invoked by alias); 9 Jul 2018 16:39:19 -0000 Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Archive: List-Post: List-Help: Sender: gcc-patches-owner@gcc.gnu.org Delivered-To: mailing list gcc-patches@gcc.gnu.org Received: (qmail 90181 invoked by uid 89); 9 Jul 2018 16:39:18 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-26.9 required=5.0 tests=BAYES_00, GIT_PATCH_0, GIT_PATCH_1, GIT_PATCH_2, GIT_PATCH_3, SPF_PASS autolearn=ham version=3.3.2 spammy= X-HELO: foss.arm.com Received: from foss.arm.com (HELO foss.arm.com) (217.140.101.70) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Mon, 09 Jul 2018 16:39:15 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 9814B7A9; Mon, 9 Jul 2018 09:39:14 -0700 (PDT) Received: from e120077-lin.cambridge.arm.com (e120077-lin.cambridge.arm.com [10.2.206.23]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id D162D3F589; Mon, 9 Jul 2018 09:39:13 -0700 (PDT) From: Richard Earnshaw To: gcc-patches@gcc.gnu.org Cc: Richard Earnshaw , richard.earnshaw@arm.com Subject: [PATCH 4/7] AArch64 - Add new option -mtrack-speculation Date: Mon, 9 Jul 2018 17:38:16 +0100 Message-Id: <1531154299-28349-5-git-send-email-Richard.Earnshaw@arm.com> In-Reply-To: <1531154299-28349-1-git-send-email-Richard.Earnshaw@arm.com> References: <1531154299-28349-1-git-send-email-Richard.Earnshaw@arm.com> MIME-Version: 1.0 This patch doesn't do anything useful, it simply adds a new command-line option -mtrack-speculation to AArch64. Subsequent patches build on this. * config/aarch64/aarch64.opt (mtrack-speculation): New target option. --- gcc/config/aarch64/aarch64.opt | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/gcc/config/aarch64/aarch64.opt b/gcc/config/aarch64/aarch64.opt index 1426b45..bc9b22a 100644 --- a/gcc/config/aarch64/aarch64.opt +++ b/gcc/config/aarch64/aarch64.opt @@ -214,3 +214,7 @@ Target RejectNegative Joined Enum(sve_vector_bits) Var(aarch64_sve_vector_bits) mverbose-cost-dump Common Undocumented Var(flag_aarch64_verbose_cost) Enables verbose cost model dumping in the debug dump files. + +mtrack-speculation +Target Var(aarch64_track_speculation) +Generate code to track when the CPU might be speculating incorrectly.