From patchwork Mon May 23 14:40:53 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kirill Batuzov X-Patchwork-Id: 96953 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [140.186.70.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 52057B6FB4 for ; Tue, 24 May 2011 00:43:06 +1000 (EST) Received: from localhost ([::1]:55665 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QOWLX-0003q7-JQ for incoming@patchwork.ozlabs.org; Mon, 23 May 2011 10:43:03 -0400 Received: from eggs.gnu.org ([140.186.70.92]:46085) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QOWJp-0001M9-Lp for qemu-devel@nongnu.org; Mon, 23 May 2011 10:41:18 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1QOWJo-0001Mf-GM for qemu-devel@nongnu.org; Mon, 23 May 2011 10:41:17 -0400 Received: from smtp.ispras.ru ([83.149.198.202]:37597) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QOWJo-0001Lx-2F for qemu-devel@nongnu.org; Mon, 23 May 2011 10:41:16 -0400 Received: from bulbul.intra.ispras.ru (winnie.ispras.ru [83.149.198.236]) by smtp.ispras.ru (Postfix) with ESMTP id 5C89A5D40C5; Mon, 23 May 2011 18:37:20 +0400 (MSD) From: Kirill Batuzov To: qemu-devel@nongnu.org Date: Mon, 23 May 2011 18:40:53 +0400 Message-Id: <1306161654-4388-8-git-send-email-batuzovk@ispras.ru> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1306161654-4388-1-git-send-email-batuzovk@ispras.ru> References: <1306161654-4388-1-git-send-email-batuzovk@ispras.ru> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6, seldom 2.4 (older, 4) X-Received-From: 83.149.198.202 Cc: zhur@ispras.ru Subject: [Qemu-devel] [RFC][PATCH v0 7/8] Spill globals early if their next use is at the BB end. 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 Spill globals early if their next use is at the BB end. They'll be spilled anyway in this case. Signed-off-by: Kirill Batuzov --- tcg/tcg.c | 13 +++++++++---- 1 files changed, 9 insertions(+), 4 deletions(-) diff --git a/tcg/tcg.c b/tcg/tcg.c index ad5bd71..022eef9 100644 --- a/tcg/tcg.c +++ b/tcg/tcg.c @@ -1179,11 +1179,16 @@ static inline void tcg_la_func_end(TCGContext *s, uint8_t *dead_temps) /* liveness analysis: end of basic block: globals are live, temps are dead, local temps are live. */ static inline void tcg_la_bb_end(TCGContext *s, uint8_t *dead_temps, - int *temp_next_use) + int *temp_next_use, int op_index) { int i; TCGTemp *ts; +#ifdef USE_ADVANCED_REGALLOC + for (i = 0; i < s->nb_globals; i++) { + temp_next_use[i] = op_index; + } +#endif memset(dead_temps, 0, s->nb_globals); ts = &s->temps[s->nb_globals]; for(i = s->nb_globals; i < s->nb_temps; i++) { @@ -1328,7 +1333,7 @@ static void tcg_liveness_analysis(TCGContext *s) args--; next_use_ptr--; /* mark end of basic block */ - tcg_la_bb_end(s, dead_temps, temp_next_use); + tcg_la_bb_end(s, dead_temps, temp_next_use, op_index); break; case INDEX_op_debug_insn_start: args -= def->nb_args; @@ -1394,7 +1399,7 @@ static void tcg_liveness_analysis(TCGContext *s) /* if end of basic block, update */ if (def->flags & TCG_OPF_BB_END) { - tcg_la_bb_end(s, dead_temps, temp_next_use); + tcg_la_bb_end(s, dead_temps, temp_next_use, op_index); } else if (def->flags & TCG_OPF_CALL_CLOBBER) { /* globals are live */ memset(dead_temps, 0, s->nb_globals); @@ -2203,7 +2208,7 @@ static inline int tcg_gen_code_common(TCGContext *s, uint8_t *gen_code_buf, #ifdef USE_ADVANCED_REGALLOC if (args[0] < s->nb_globals) { if (tcg_op_defs[gen_opc_buf[param_next_use_ptr[0]]].flags - & TCG_OPF_CALL_CLOBBER) { + & (TCG_OPF_CALL_CLOBBER | TCG_OPF_BB_END)) { tcg_reg_free(s, s->temps[args[0]].reg); } }