From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 2181) id 1754D385AF84; Tue, 18 Jul 2023 11:01:05 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 1754D385AF84 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1689678065; bh=yl3aFE60BaFE8Aot2DN1hf/SB2IhceEYIU5QzNRfFzs=; h=From:To:Subject:Date:From; b=qet6kwhg0j787rlf+Aa0iZenLes6tbVpjcSgldPbtLzW/3vV6APnF/6BQuZsYfvJo rZ47jqqODLDt1bqE3amCZOxQyW3QiPeZOx0rW/HsSBJ8GqFFgBCtqGuE3uhx7rPENg 5h17WTGE04h0EBxd00JXIc6hq8qdBDYn/7fF5yO0= MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="utf-8" From: Jonathan Wakely To: gcc-cvs@gcc.gnu.org, libstdc++-cvs@gcc.gnu.org Subject: [gcc r13-7580] libstdc++: Fix std::__uninitialized_default_n for constant evaluation [PR110542] X-Act-Checkin: gcc X-Git-Author: Jonathan Wakely X-Git-Refname: refs/heads/releases/gcc-13 X-Git-Oldrev: d96e4962f53416f64393c6858dcf8089a748d47d X-Git-Newrev: a32d4a34da72087c9f9bdfe3f987b808be814cd7 Message-Id: <20230718110105.1754D385AF84@sourceware.org> Date: Tue, 18 Jul 2023 11:01:05 +0000 (GMT) List-Id: https://gcc.gnu.org/g:a32d4a34da72087c9f9bdfe3f987b808be814cd7 commit r13-7580-ga32d4a34da72087c9f9bdfe3f987b808be814cd7 Author: Jonathan Wakely Date: Tue Jul 4 16:03:45 2023 +0100 libstdc++: Fix std::__uninitialized_default_n for constant evaluation [PR110542] libstdc++-v3/ChangeLog: PR libstdc++/110542 * include/bits/stl_uninitialized.h (__uninitialized_default_n): Do not use std::fill_n during constant evaluation. (cherry picked from commit 83cae6c4b788544635a71748e1881c150f42efef) Diff: --- libstdc++-v3/include/bits/stl_uninitialized.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/libstdc++-v3/include/bits/stl_uninitialized.h b/libstdc++-v3/include/bits/stl_uninitialized.h index 6752c6b5746..be7b4afdd05 100644 --- a/libstdc++-v3/include/bits/stl_uninitialized.h +++ b/libstdc++-v3/include/bits/stl_uninitialized.h @@ -695,6 +695,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION inline _ForwardIterator __uninitialized_default_n(_ForwardIterator __first, _Size __n) { +#ifdef __cpp_lib_is_constant_evaluated + if (std::is_constant_evaluated()) + return __uninitialized_default_n_1:: + __uninit_default_n(__first, __n); +#endif + typedef typename iterator_traits<_ForwardIterator>::value_type _ValueType; // See uninitialized_fill_n for the conditions for using std::fill_n.