From patchwork Wed Sep 19 20:00:19 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aurelien Jarno X-Patchwork-Id: 185211 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 8A6D62C007D for ; Thu, 20 Sep 2012 06:01:12 +1000 (EST) Received: from localhost ([::1]:52961 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TEQSM-0004j7-Is for incoming@patchwork.ozlabs.org; Wed, 19 Sep 2012 16:01:10 -0400 Received: from eggs.gnu.org ([208.118.235.92]:42154) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TEQRp-0003mk-Hw for qemu-devel@nongnu.org; Wed, 19 Sep 2012 16:00:46 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TEQRg-0002Bb-K0 for qemu-devel@nongnu.org; Wed, 19 Sep 2012 16:00:37 -0400 Received: from hall.aurel32.net ([88.191.126.93]:52039) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TEQRg-00028I-DQ for qemu-devel@nongnu.org; Wed, 19 Sep 2012 16:00:28 -0400 Received: from [2001:470:d4ed:1:2db:dfff:fe14:52d] (helo=ohm.aurel32.net) by hall.aurel32.net with esmtpsa (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.72) (envelope-from ) id 1TEQRf-00052R-47; Wed, 19 Sep 2012 22:00:27 +0200 Received: from aurel32 by ohm.aurel32.net with local (Exim 4.80) (envelope-from ) id 1TEQRd-0004ox-95; Wed, 19 Sep 2012 22:00:25 +0200 From: Aurelien Jarno To: qemu-devel@nongnu.org Date: Wed, 19 Sep 2012 22:00:19 +0200 Message-Id: <1348084823-18277-6-git-send-email-aurelien@aurel32.net> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1348084823-18277-1-git-send-email-aurelien@aurel32.net> References: <1348084823-18277-1-git-send-email-aurelien@aurel32.net> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-Received-From: 88.191.126.93 Cc: Aurelien Jarno Subject: [Qemu-devel] [PATCH 5/9] tcg/optimize: optimize "op r, a, a => mov r, a" X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Now that we can easily detect all copies, we can optimize the "op r, a, a => mov r, a" case a bit more. Signed-off-by: Aurelien Jarno Reviewed-by: Richard Henderson --- tcg/optimize.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tcg/optimize.c b/tcg/optimize.c index a58de3b..cfee690 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -503,7 +503,7 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, switch (op) { CASE_OP_32_64(or): CASE_OP_32_64(and): - if (args[1] == args[2]) { + if (temps_are_copies(args[1], args[2])) { if (temps_are_copies(args[0], args[1])) { gen_opc_buf[op_index] = INDEX_op_nop; } else {