From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 4BBD5385802E; Thu, 4 Aug 2022 14:14:10 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 4BBD5385802E From: "danglin at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/106458] [12/13 Regression] glibc's malloc/tst-scratch_buffer.c test is miscompiled with gcc-12 Date: Thu, 04 Aug 2022 14:14:10 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: tree-optimization X-Bugzilla-Version: 12.1.0 X-Bugzilla-Keywords: wrong-code X-Bugzilla-Severity: normal X-Bugzilla-Who: danglin at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 12.2 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: component Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: gcc-bugs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-bugs mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 04 Aug 2022 14:14:10 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106458 John David Anglin changed: What |Removed |Added ---------------------------------------------------------------------------- Component|target |tree-optimization --- Comment #8 from John David Anglin --- This bug was introduced in the following commit: dave@atlas:~/gnu/gcc/gcc$ git bisect bad Bisecting: 0 revisions left to test after this (roughly 0 steps) [2b8453c401b699ed93c085d0413ab4b5030bcdb8] Enable auto-vectorization at O2 = with very-cheap cost model. dave@atlas:~/gnu/gcc/gcc$ git log commit 2b8453c401b699ed93c085d0413ab4b5030bcdb8 (HEAD) Author: liuhongt Date: Mon Sep 6 13:48:49 2021 +0800 Enable auto-vectorization at O2 with very-cheap cost model. gcc/ChangeLog: * common.opt (ftree-vectorize): Add Var(flag_tree_vectorize). * doc/invoke.texi (Options That Control Optimization): Update documents. * opts.c (default_options_table): Enable auto-vectorization at O2 with very-cheap cost model. (finish_options): Use cheap cost model for explicit -ftree{,-loop}-vectorize. gcc/testsuite/ChangeLog: * c-c++-common/Wstringop-overflow-2.c: Adjust testcase. * g++.dg/tree-ssa/pr81408.C: Ditto. * g++.dg/warn/Wuninitialized-13.C: Ditto. * gcc.dg/Warray-bounds-51.c: Ditto. * gcc.dg/Warray-parameter-3.c: Ditto. dave@atlas:~/gnu/gcc/gcc$ git bisect bad 2b8453c401b699ed93c085d0413ab4b5030bcdb8 is the first bad commit commit 2b8453c401b699ed93c085d0413ab4b5030bcdb8 Author: liuhongt Date: Mon Sep 6 13:48:49 2021 +0800 Enable auto-vectorization at O2 with very-cheap cost model. gcc/ChangeLog: * common.opt (ftree-vectorize): Add Var(flag_tree_vectorize). * doc/invoke.texi (Options That Control Optimization): Update documents. * opts.c (default_options_table): Enable auto-vectorization at O2 with very-cheap cost model. (finish_options): Use cheap cost model for explicit -ftree{,-loop}-vectorize. gcc/testsuite/ChangeLog: * c-c++-common/Wstringop-overflow-2.c: Adjust testcase. * g++.dg/tree-ssa/pr81408.C: Ditto. * g++.dg/warn/Wuninitialized-13.C: Ditto. * gcc.dg/Warray-bounds-51.c: Ditto. * gcc.dg/Warray-parameter-3.c: Ditto. * gcc.dg/Wstringop-overflow-14.c: Ditto. * gcc.dg/Wstringop-overflow-21.c: Ditto. * gcc.dg/Wstringop-overflow-68.c: Ditto. * gcc.dg/Wstringop-overflow-76.c: Ditto. * gcc.dg/gomp/pr46032-2.c: Ditto. * gcc.dg/gomp/pr46032-3.c: Ditto. * gcc.dg/gomp/simd-2.c: Ditto. * gcc.dg/gomp/simd-3.c: Ditto. * gcc.dg/graphite/fuse-1.c: Ditto. * gcc.dg/pr67089-6.c: Ditto. * gcc.dg/pr82929-2.c: Ditto. * gcc.dg/pr82929.c: Ditto. * gcc.dg/store_merging_1.c: Ditto. * gcc.dg/store_merging_11.c: Ditto. * gcc.dg/store_merging_13.c: Ditto. * gcc.dg/store_merging_15.c: Ditto. * gcc.dg/store_merging_16.c: Ditto. * gcc.dg/store_merging_19.c: Ditto. * gcc.dg/store_merging_24.c: Ditto. * gcc.dg/store_merging_25.c: Ditto. * gcc.dg/store_merging_28.c: Ditto. * gcc.dg/store_merging_30.c: Ditto. * gcc.dg/store_merging_5.c: Ditto. * gcc.dg/store_merging_7.c: Ditto. * gcc.dg/store_merging_8.c: Ditto. * gcc.dg/strlenopt-85.c: Ditto. * gcc.dg/tree-ssa/dump-6.c: Ditto. * gcc.dg/tree-ssa/pr19210-1.c: Ditto. * gcc.dg/tree-ssa/pr47059.c: Ditto. * gcc.dg/tree-ssa/pr86017.c: Ditto. * gcc.dg/tree-ssa/pr91482.c: Ditto. * gcc.dg/tree-ssa/predcom-1.c: Ditto. * gcc.dg/tree-ssa/predcom-dse-3.c: Ditto. * gcc.dg/tree-ssa/prefetch-3.c: Ditto. * gcc.dg/tree-ssa/prefetch-6.c: Ditto. * gcc.dg/tree-ssa/prefetch-8.c: Ditto. * gcc.dg/tree-ssa/prefetch-9.c: Ditto. * gcc.dg/tree-ssa/ssa-dse-18.c: Ditto. * gcc.dg/tree-ssa/ssa-dse-19.c: Ditto. * gcc.dg/uninit-40.c: Ditto. * gcc.dg/unroll-7.c: Ditto. * gcc.misc-tests/help.exp: Ditto. * gcc.target/i386/avx512vpopcntdqvl-vpopcntd-1.c: Ditto. * gcc.target/i386/pr34012.c: Ditto. * gcc.target/i386/pr49781-1.c: Ditto. * gcc.target/i386/pr95798-1.c: Ditto. * gcc.target/i386/pr95798-2.c: Ditto. * gfortran.dg/pr77498.f: Ditto. gcc/common.opt | 2 +- gcc/doc/invoke.texi | 8 ++++---- gcc/opts.c | 16 +++++++++++++--- gcc/testsuite/c-c++-common/Wstringop-overflow-2.c | 20 ++++++++++------= ---- gcc/testsuite/g++.dg/tree-ssa/pr81408.C | 2 +- gcc/testsuite/g++.dg/warn/Wuninitialized-13.C | 2 +- gcc/testsuite/gcc.dg/Warray-bounds-51.c | 2 +- gcc/testsuite/gcc.dg/Warray-parameter-3.c | 4 ++-- gcc/testsuite/gcc.dg/Wstringop-overflow-14.c | 4 ++-- gcc/testsuite/gcc.dg/Wstringop-overflow-21.c | 8 ++++---- gcc/testsuite/gcc.dg/Wstringop-overflow-68.c | 10 +++++----- gcc/testsuite/gcc.dg/Wstringop-overflow-76.c | 20 ++++++++++------= ---- gcc/testsuite/gcc.dg/gomp/pr46032-2.c | 2 +- gcc/testsuite/gcc.dg/gomp/pr46032-3.c | 2 +- gcc/testsuite/gcc.dg/gomp/simd-2.c | 2 +- gcc/testsuite/gcc.dg/gomp/simd-3.c | 2 +- gcc/testsuite/gcc.dg/graphite/fuse-1.c | 2 +- gcc/testsuite/gcc.dg/pr67089-6.c | 2 +- gcc/testsuite/gcc.dg/pr82929-2.c | 2 +- gcc/testsuite/gcc.dg/pr82929.c | 2 +- gcc/testsuite/gcc.dg/store_merging_1.c | 2 +- gcc/testsuite/gcc.dg/store_merging_11.c | 2 +- gcc/testsuite/gcc.dg/store_merging_13.c | 2 +- gcc/testsuite/gcc.dg/store_merging_15.c | 2 +- gcc/testsuite/gcc.dg/store_merging_16.c | 2 +- gcc/testsuite/gcc.dg/store_merging_19.c | 2 +- gcc/testsuite/gcc.dg/store_merging_24.c | 2 +- gcc/testsuite/gcc.dg/store_merging_25.c | 2 +- gcc/testsuite/gcc.dg/store_merging_28.c | 2 +- gcc/testsuite/gcc.dg/store_merging_30.c | 2 +- gcc/testsuite/gcc.dg/store_merging_5.c | 2 +- gcc/testsuite/gcc.dg/store_merging_7.c | 2 +- gcc/testsuite/gcc.dg/store_merging_8.c | 2 +- gcc/testsuite/gcc.dg/strlenopt-85.c | 2 +- gcc/testsuite/gcc.dg/tree-ssa/dump-6.c | 2 +- gcc/testsuite/gcc.dg/tree-ssa/pr19210-1.c | 2 +- gcc/testsuite/gcc.dg/tree-ssa/pr47059.c | 2 +- gcc/testsuite/gcc.dg/tree-ssa/pr86017.c | 2 +- gcc/testsuite/gcc.dg/tree-ssa/pr91482.c | 2 +- gcc/testsuite/gcc.dg/tree-ssa/predcom-1.c | 2 +- gcc/testsuite/gcc.dg/tree-ssa/predcom-dse-3.c | 2 +- gcc/testsuite/gcc.dg/tree-ssa/prefetch-3.c | 2 +- gcc/testsuite/gcc.dg/tree-ssa/prefetch-6.c | 2 +- gcc/testsuite/gcc.dg/tree-ssa/prefetch-8.c | 2 +- gcc/testsuite/gcc.dg/tree-ssa/prefetch-9.c | 2 +- gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-18.c | 2 +- gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-19.c | 2 +- gcc/testsuite/gcc.dg/uninit-40.c | 2 +- gcc/testsuite/gcc.dg/unroll-7.c | 2 +- gcc/testsuite/gcc.misc-tests/help.exp | 2 +- .../gcc.target/i386/avx512vpopcntdqvl-vpopcntd-1.c | 2 +- gcc/testsuite/gcc.target/i386/pr34012.c | 2 +- gcc/testsuite/gcc.target/i386/pr49781-1.c | 2 +- gcc/testsuite/gcc.target/i386/pr95798-1.c | 2 +- gcc/testsuite/gcc.target/i386/pr95798-2.c | 2 +- gcc/testsuite/gfortran.dg/pr77498.f | 2 +- 56 files changed, 98 insertions(+), 88 deletions(-)=