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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// #include <memory>
// template<size_t N, class T>
// [[nodiscard]] constexpr T* assume_aligned(T* ptr);
#include <memory>
#include <cassert>
#include <cstddef>
#include "test_macros.h"
template <typename T>
constexpr void check(T* p) {
ASSERT_SAME_TYPE(T*, decltype(std::assume_aligned<1>(p)));
constexpr std::size_t alignment = alignof(T);
if constexpr (alignment >= 1)
assert(p == std::assume_aligned<1>(p));
if constexpr (alignment >= 2)
assert(p == std::assume_aligned<2>(p));
if constexpr (alignment >= 4)
assert(p == std::assume_aligned<4>(p));
if constexpr (alignment >= 8)
assert(p == std::assume_aligned<8>(p));
if constexpr (alignment >= 16)
assert(p == std::assume_aligned<16>(p));
if constexpr (alignment >= 32)
assert(p == std::assume_aligned<32>(p));
if constexpr (alignment >= 64)
assert(p == std::assume_aligned<64>(p));
if constexpr (alignment >= 128)
assert(p == std::assume_aligned<128>(p));
}
struct S { };
struct alignas( 4) S4 { };
struct alignas( 8) S8 { };
struct alignas( 16) S16 { };
struct alignas( 32) S32 { };
struct alignas( 64) S64 { };
struct alignas(128) S128 { };
constexpr bool tests() {
char c;
int i;
long l;
double d;
long double ld;
check( &c);
check( &i);
check( &l);
check( &d);
check(&ld);
S s;
S4 s4;
S8 s8;
S16 s16;
S32 s32;
S64 s64;
S128 s128;
check(&s);
check(&s4);
check(&s8);
check(&s16);
check(&s32);
check(&s64);
check(&s128);
return true;
}
int main(int, char**) {
tests();
static_assert(tests());
return 0;
}
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