From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 2181) id 7A3AB3857713; Wed, 5 Jul 2023 06:39:49 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 7A3AB3857713 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1688539189; bh=UlTDCRu42fPrOcKeewSKrDQmrRRkrRSaZ4agUwmkWqc=; h=From:To:Subject:Date:From; b=u/K6cQTw7cUpdAyXH/hPyw4Upusszhlu4/hwY3lasCnCAkc8DuUSZnD5xtnyBeD5I KjHgpVpGskel2+TrFOdinamnmaL2xt/6sGfI5wcXjtQ+BRckF+T0pzEr7LtO1VLClP B0t91GDZ+jQ5L79E6UYd35C1bACbXjqDX/tCTJFw= 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 r14-2306] libstdc++: Fix std::__uninitialized_default_n for constant evaluation [PR110542] X-Act-Checkin: gcc X-Git-Author: Jonathan Wakely X-Git-Refname: refs/heads/master X-Git-Oldrev: 4870a18ac2d5e0bd8515ea473006071e65622e52 X-Git-Newrev: 83cae6c4b788544635a71748e1881c150f42efef Message-Id: <20230705063949.7A3AB3857713@sourceware.org> Date: Wed, 5 Jul 2023 06:39:49 +0000 (GMT) List-Id: https://gcc.gnu.org/g:83cae6c4b788544635a71748e1881c150f42efef commit r14-2306-g83cae6c4b788544635a71748e1881c150f42efef 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. 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.