From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:58574) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UaBCN-0000vD-Eq for qemu-devel@nongnu.org; Wed, 08 May 2013 16:42:52 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UaBCL-0002ki-Qt for qemu-devel@nongnu.org; Wed, 08 May 2013 16:42:51 -0400 Received: from hall.aurel32.net ([2001:470:1f15:c4f::1]:59069) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UaBCL-0002kR-KT for qemu-devel@nongnu.org; Wed, 08 May 2013 16:42:49 -0400 From: Aurelien Jarno Date: Wed, 8 May 2013 22:42:42 +0200 Message-Id: <1368045762-9769-1-git-send-email-aurelien@aurel32.net> Subject: [Qemu-devel] [PATCH for 1.5] tcg/optimize: fix setcond2 optimization List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Michael Tokarev , Aurelien Jarno , Richard Henderson When setcond2 is rewritten into setcond, the state of the destination temp should be reset, so that a copy of the previous value is not used instead of the result. Reported-by: Michael Tokarev Cc: Richard Henderson Signed-off-by: Aurelien Jarno --- tcg/optimize.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tcg/optimize.c b/tcg/optimize.c index 1b6644c..b35868a 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -1057,6 +1057,7 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, /* Simplify LT/GE comparisons vs zero to a single compare vs the high word of the input. */ s->gen_opc_buf[op_index] = INDEX_op_setcond_i32; + reset_temp(args[0]); gen_args[0] = args[0]; gen_args[1] = args[2]; gen_args[2] = args[4]; -- 1.7.10.4