From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 1011) id 654BA3857C7B; Wed, 6 Oct 2021 14:52:16 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 654BA3857C7B MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="utf-8" From: Andrew Macleod To: gcc-cvs@gcc.gnu.org Subject: [gcc r12-4209] Ranger: More efficient zero/nonzero check. X-Act-Checkin: gcc X-Git-Author: Andrew MacLeod X-Git-Refname: refs/heads/master X-Git-Oldrev: 90c3a62272313bb08cd5d9a948ff2d71af73b294 X-Git-Newrev: 4b8ca6c6177b2bd948c1cb2a116955b942751559 Message-Id: <20211006145216.654BA3857C7B@sourceware.org> Date: Wed, 6 Oct 2021 14:52:16 +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: Wed, 06 Oct 2021 14:52:16 -0000 https://gcc.gnu.org/g:4b8ca6c6177b2bd948c1cb2a116955b942751559 commit r12-4209-g4b8ca6c6177b2bd948c1cb2a116955b942751559 Author: Andrew MacLeod Date: Mon Sep 27 18:53:54 2021 -0400 Ranger: More efficient zero/nonzero check. A recent change introduced a frequent check for zero and non-zero which has caused a lot of extra temporary trees to be created. Make the check more efficent as it is always a pointer and thus unsigned. * gimple-range-cache.cc (non_null_ref::adjust_range): Check for zero and non-zero more efficently. Diff: --- gcc/gimple-range-cache.cc | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/gcc/gimple-range-cache.cc b/gcc/gimple-range-cache.cc index 61043d3f375..91dd5a5c087 100644 --- a/gcc/gimple-range-cache.cc +++ b/gcc/gimple-range-cache.cc @@ -98,9 +98,10 @@ non_null_ref::adjust_range (irange &r, tree name, basic_block bb, return false; // We only care about the null / non-null property of pointers. - if (!POINTER_TYPE_P (TREE_TYPE (name)) || r.zero_p () || r.nonzero_p ()) + if (!POINTER_TYPE_P (TREE_TYPE (name))) + return false; + if (r.undefined_p () || r.lower_bound () != 0 || r.upper_bound () == 0) return false; - // Check if pointers have any non-null dereferences. if (non_null_deref_p (name, bb, search_dom)) {