From patchwork Fri Sep 7 13:16:25 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aurelien Jarno X-Patchwork-Id: 182373 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 C14C12C008B for ; Fri, 7 Sep 2012 23:46:33 +1000 (EST) Received: from localhost ([::1]:44846 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1T9yQS-0002x3-MS for incoming@patchwork.ozlabs.org; Fri, 07 Sep 2012 09:16:48 -0400 Received: from eggs.gnu.org ([208.118.235.92]:57070) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1T9yQI-0002vO-RI for qemu-devel@nongnu.org; Fri, 07 Sep 2012 09:16:42 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1T9yQH-0000rV-K2 for qemu-devel@nongnu.org; Fri, 07 Sep 2012 09:16:38 -0400 Received: from hall.aurel32.net ([88.191.126.93]:37136) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1T9yQH-0000qu-DW for qemu-devel@nongnu.org; Fri, 07 Sep 2012 09:16:37 -0400 Received: from [46.27.142.81] (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 1T9yQG-00040h-CU; Fri, 07 Sep 2012 15:16:36 +0200 Received: from aurel32 by ohm.aurel32.net with local (Exim 4.80) (envelope-from ) id 1T9yQE-0006Op-2g; Fri, 07 Sep 2012 15:16:34 +0200 From: Aurelien Jarno To: qemu-devel@nongnu.org Date: Fri, 7 Sep 2012 15:16:25 +0200 Message-Id: <1347023792-24045-3-git-send-email-aurelien@aurel32.net> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1347023792-24045-1-git-send-email-aurelien@aurel32.net> References: <1347023792-24045-1-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 2/9] tcg/optimize: split expression simplification 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 Split expression simplification in multiple parts so that a given op can appear multiple times. This patch should not change anything. Reviewed-by: Richard Henderson Signed-off-by: Aurelien Jarno --- tcg/optimize.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/tcg/optimize.c b/tcg/optimize.c index 9c65474..63f970d 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -322,7 +322,7 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, break; } - /* Simplify expression if possible. */ + /* Simplify expression for "op r, a, 0 => mov r, a" cases */ switch (op) { CASE_OP_32_64(add): CASE_OP_32_64(sub): @@ -352,6 +352,12 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, continue; } break; + default: + break; + } + + /* Simplify expression for "op r, a, 0 => movi r, 0" cases */ + switch (op) { CASE_OP_32_64(mul): if ((temps[args[2]].state == TCG_TEMP_CONST && temps[args[2]].val == 0)) { @@ -362,6 +368,12 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, continue; } break; + default: + break; + } + + /* Simplify expression for "op r, a, a => mov r, a" cases */ + switch (op) { CASE_OP_32_64(or): CASE_OP_32_64(and): if (args[1] == args[2]) {