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From: "zeranoe at gmail dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/100366] [11/12/13 Regression] spurious warning - std::vector::clear followed by std::vector::insert(vec.end(), ...) with -O2 Date: Sat, 26 Nov 2022 15:53:12 +0000 [thread overview] Message-ID: <bug-100366-4-pCiTAPL6qt@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-100366-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100366 Kyle Schwarz <zeranoe at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |zeranoe at gmail dot com --- Comment #14 from Kyle Schwarz <zeranoe at gmail dot com> --- I also ran into this with: > auto data = std::make_shared<std::vector<uint8_t>>(); > data->insert(data->end(), {0xAA, 0xBB, 0xCC}); I do not hit it with: > std::vector<uint8_t> data; > data.insert(data.end(), {0xAA, 0xBB, 0xCC}); Bisecting shows it was introduced with 81d6cdd335ffc60c216a020d5c99306f659377a2. In gcc/gimple-ssa-warn-access.cc pass_waccess::check() there's now a call to the new pass_waccess::check_builtin() which throws this warning (BUILT_IN_MEMMOVE, check_memop_access()). The old behavior had these checks scattered throughout builtins.c but now with it being part of pass_waccess::check() it is called for each bb as part of pass_waccess::execute().
next prev parent reply other threads:[~2022-11-26 15:53 UTC|newest] Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-05-01 2:36 [Bug c++/100366] New: " mrsam@courier-mta.com 2021-05-02 11:27 ` [Bug tree-optimization/100366] " glisse at gcc dot gnu.org 2021-05-03 17:51 ` msebor at gcc dot gnu.org 2021-05-03 21:02 ` mrsam@courier-mta.com 2021-05-04 7:39 ` rguenth at gcc dot gnu.org 2021-05-05 10:55 ` glisse at gcc dot gnu.org 2021-05-05 11:01 ` glisse at gcc dot gnu.org 2021-05-05 11:15 ` glisse at gcc dot gnu.org 2021-05-05 12:18 ` mrsam@courier-mta.com 2021-05-12 23:44 ` msebor at gcc dot gnu.org 2021-12-02 21:14 ` msebor at gcc dot gnu.org 2021-12-06 16:45 ` [Bug tree-optimization/100366] [11/12 Regression] " roystgnr at ices dot utexas.edu 2021-12-28 12:09 ` pinskia at gcc dot gnu.org 2022-01-20 14:03 ` rguenth at gcc dot gnu.org 2022-04-21 7:49 ` rguenth at gcc dot gnu.org 2022-07-05 10:07 ` [Bug tree-optimization/100366] [11/12/13 " hewillk at gmail dot com 2022-11-26 15:53 ` zeranoe at gmail dot com [this message] 2022-11-29 15:58 ` redi at gcc dot gnu.org 2022-11-29 17:14 ` cvs-commit at gcc dot gnu.org 2023-04-20 13:57 ` [Bug tree-optimization/100366] [11/12 " cvs-commit at gcc dot gnu.org 2023-05-29 10:04 ` jakub at gcc dot gnu.org
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