From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 2100) id B6DC23851C16; Sat, 22 Aug 2020 21:21:03 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org B6DC23851C16 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1598131263; bh=dhTkt0sfIoXZPp+E6NmhMPBspXWyFzuRlCqxI1xAqRI=; h=From:To:Subject:Date:From; b=a2SzOWB0vbEvUVvnagyTqsD3Q73wsYnk99xdr6PTDMdRM4tlSuaLLkq5hMsMozMP3 38gyBe6SE2mHZGqyVecv9fE8CzjRzkj5iGQQoi8Mg1OaXEQhrRPormYQhai3OhXGvC M6cjsutts8dleoV35cvKD2JFl24fQt156PVbTkRY= Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: Giuliano Belinassi To: gcc-cvs@gcc.gnu.org Subject: [gcc/devel/autopar_devel] tree-optimization: Fix use of uninitialized variables warnings [PR94952] X-Act-Checkin: gcc X-Git-Author: Stefan Schulze Frielinghaus X-Git-Refname: refs/heads/devel/autopar_devel X-Git-Oldrev: a755d2a07d113f39f99cb6a0a311fcdc625d2aec X-Git-Newrev: 8700d3a8360e686c8d5ee441b1fdbd7eb7e90e05 Message-Id: <20200822212103.B6DC23851C16@sourceware.org> Date: Sat, 22 Aug 2020 21:21:03 +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: Sat, 22 Aug 2020 21:21:03 -0000 https://gcc.gnu.org/g:8700d3a8360e686c8d5ee441b1fdbd7eb7e90e05 commit 8700d3a8360e686c8d5ee441b1fdbd7eb7e90e05 Author: Stefan Schulze Frielinghaus Date: Tue May 5 19:44:19 2020 +0200 tree-optimization: Fix use of uninitialized variables warnings [PR94952] While bootstrapping GCC on S/390 with --enable-checking=release several warnings about use of uninitialized variables bitpos, bitregion_start, and bitregion_end of function pass_store_merging::process_store are raised. According to PR94952 these seem to be false positives which are silenced by initialising the mentioned variables. Bootstrapped on S/390. Ok for master and releases/gcc-10 assuming that regtest succeeds (still running but I don't see a reason why it should fail)? gcc/ChangeLog: 2020-05-18 Stefan Schulze Frielinghaus PR tree-optimization/94952 * gimple-ssa-store-merging.c (pass_store_merging::process_store): Initialize variables bitpos, bitregion_start, and bitregion_end in order to silence warnings about use of uninitialized variables. Diff: --- gcc/ChangeLog | 7 +++++++ gcc/gimple-ssa-store-merging.c | 4 ++-- 2 files changed, 9 insertions(+), 2 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 51b5b6c908d..0a1ff053ffa 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2020-05-18 Stefan Schulze Frielinghaus + + PR tree-optimization/94952 + * gimple-ssa-store-merging.c (pass_store_merging::process_store): + Initialize variables bitpos, bitregion_start, and bitregion_end in + order to silence warnings about use of uninitialized variables. + 2020-05-18 Carl Love PR target/94833 diff --git a/gcc/gimple-ssa-store-merging.c b/gcc/gimple-ssa-store-merging.c index 25753517cc6..c8e1877f540 100644 --- a/gcc/gimple-ssa-store-merging.c +++ b/gcc/gimple-ssa-store-merging.c @@ -4668,8 +4668,8 @@ pass_store_merging::process_store (gimple *stmt) { tree lhs = gimple_assign_lhs (stmt); tree rhs = gimple_assign_rhs1 (stmt); - poly_uint64 bitsize, bitpos; - poly_uint64 bitregion_start, bitregion_end; + poly_uint64 bitsize, bitpos = 0; + poly_uint64 bitregion_start = 0, bitregion_end = 0; tree base_addr = mem_valid_for_store_merging (lhs, &bitsize, &bitpos, &bitregion_start, &bitregion_end);