From patchwork Fri Sep 21 19:43:13 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aurelien Jarno X-Patchwork-Id: 185899 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 EC4802C0089 for ; Sat, 22 Sep 2012 05:45:31 +1000 (EST) Received: from localhost ([::1]:48968 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TF9AH-0003Uw-Td for incoming@patchwork.ozlabs.org; Fri, 21 Sep 2012 15:45:29 -0400 Received: from eggs.gnu.org ([208.118.235.92]:59161) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TF98n-0008Br-6g for qemu-devel@nongnu.org; Fri, 21 Sep 2012 15:43:58 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TF98h-0002ld-5N for qemu-devel@nongnu.org; Fri, 21 Sep 2012 15:43:57 -0400 Received: from hall.aurel32.net ([88.191.126.93]:43258) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TF98g-0002k8-SK for qemu-devel@nongnu.org; Fri, 21 Sep 2012 15:43:51 -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 1TF98f-0005jw-0b; Fri, 21 Sep 2012 21:43:49 +0200 Received: from aurel32 by ohm.aurel32.net with local (Exim 4.80) (envelope-from ) id 1TF98d-0002Ld-9b; Fri, 21 Sep 2012 21:43:47 +0200 From: Aurelien Jarno To: qemu-devel@nongnu.org Date: Fri, 21 Sep 2012 21:43:13 +0200 Message-Id: <1348256598-8146-6-git-send-email-aurelien@aurel32.net> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1348256598-8146-1-git-send-email-aurelien@aurel32.net> References: <1348256598-8146-1-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 v2 05/10] 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. Reviewed-by: Richard Henderson Signed-off-by: Aurelien Jarno --- tcg/optimize.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tcg/optimize.c b/tcg/optimize.c index aeb2225..b9a7da9 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -524,7 +524,7 @@ 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 {