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[thirdparty/gcc.git] / libstdc++-v3 / testsuite / 20_util / assume_aligned / 97132.cc

// Copyright (C) 2020-2023 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" }
// { dg-do compile { target c++2a } }

#include <memory>

// PR libstdc++/97132 - assume_aligned is not constexpr

constexpr bool test01()
{
  struct alignas(32) S { int i; };
  S s{42};
  int* p = std::assume_aligned<32>(&s.i);
  *p = 48;
  return s.i == 48;
}

static_assert( test01() );