From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 1666) id 059D13858403; Thu, 25 Nov 2021 13:24:26 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 059D13858403 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="utf-8" From: Richard Biener To: gcc-cvs@gcc.gnu.org Subject: [gcc r12-5518] Remove never looping loop in label_rtx_for_bb X-Act-Checkin: gcc X-Git-Author: Richard Biener X-Git-Refname: refs/heads/master X-Git-Oldrev: 555b8cc39062d1e02ed9117883229c75e17a8871 X-Git-Newrev: 0fdd1804ee8ce04821110bb19c246f9d05248e22 Message-Id: <20211125132426.059D13858403@sourceware.org> Date: Thu, 25 Nov 2021 13:24:26 +0000 (GMT) X-BeenThere: gcc-cvs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-cvs mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 25 Nov 2021 13:24:26 -0000 https://gcc.gnu.org/g:0fdd1804ee8ce04821110bb19c246f9d05248e22 commit r12-5518-g0fdd1804ee8ce04821110bb19c246f9d05248e22 Author: Richard Biener Date: Wed Nov 24 15:57:03 2021 +0100 Remove never looping loop in label_rtx_for_bb This refactors the IL "walk" in a way to avoid the loop which will never iterate. 2021-11-25 Richard Biener * cfgexpand.c (label_rtx_for_bb): Remove dead loop construct. Diff: --- gcc/cfgexpand.c | 24 ++++++------------------ 1 file changed, 6 insertions(+), 18 deletions(-) diff --git a/gcc/cfgexpand.c b/gcc/cfgexpand.c index eb6466f4be6..fb84d469f1e 100644 --- a/gcc/cfgexpand.c +++ b/gcc/cfgexpand.c @@ -2461,9 +2461,6 @@ static hash_map *lab_rtx_for_bb; static rtx_code_label * label_rtx_for_bb (basic_block bb ATTRIBUTE_UNUSED) { - gimple_stmt_iterator gsi; - tree lab; - if (bb->flags & BB_RTL) return block_label (bb); @@ -2472,21 +2469,12 @@ label_rtx_for_bb (basic_block bb ATTRIBUTE_UNUSED) return *elt; /* Find the tree label if it is present. */ - - for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi)) - { - glabel *lab_stmt; - - lab_stmt = dyn_cast (gsi_stmt (gsi)); - if (!lab_stmt) - break; - - lab = gimple_label_label (lab_stmt); - if (DECL_NONLOCAL (lab)) - break; - - return jump_target_rtx (lab); - } + gimple_stmt_iterator gsi = gsi_start_bb (bb); + glabel *lab_stmt; + if (!gsi_end_p (gsi) + && (lab_stmt = dyn_cast (gsi_stmt (gsi))) + && !DECL_NONLOCAL (gimple_label_label (lab_stmt))) + return jump_target_rtx (gimple_label_label (lab_stmt)); rtx_code_label *l = gen_label_rtx (); lab_rtx_for_bb->put (bb, l);