| // Copyright (C) 2018-2023 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING3. If not see |
| // <http://www.gnu.org/licenses/>. |
| |
| // { dg-options "-std=gnu++2a -O2 -g0" } |
| // { dg-do compile { target c++2a } } |
| // { dg-final { scan-assembler-not "undefined" } } |
| |
| #include <memory> |
| #include <cstdint> |
| |
| int* ptr(); |
| extern "C" void undefined(); |
| |
| void |
| test01() |
| { |
| const std::size_t alignment = 4 * alignof(int); |
| int* p = std::assume_aligned<alignment>(ptr()); |
| if ((std::uintptr_t)p % alignment) |
| undefined(); |
| } |
