| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // Test that _LIBCPP_ALIGNOF acts the same as the C++11 keyword `alignof`, and |
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| 10 | // not as the GNU extension `__alignof`. The former returns the minimal required |
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| 11 | // alignment for a type, whereas the latter returns the preferred alignment. |
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| 12 | // |
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| 13 | // See llvm.org/PR39713 |
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| 14 | |
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| 15 | #include <type_traits> |
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| 16 | #include "test_macros.h" |
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| 17 | |
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| 18 | template <class T> |
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| 19 | void test() { |
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| 20 | static_assert(_LIBCPP_ALIGNOF(T) == std::alignment_of<T>::value, "" ); |
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| 21 | static_assert(_LIBCPP_ALIGNOF(T) == TEST_ALIGNOF(T), "" ); |
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| 22 | #if TEST_STD_VER >= 11 |
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| 23 | static_assert(_LIBCPP_ALIGNOF(T) == alignof(T), "" ); |
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| 24 | #endif |
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| 25 | #ifdef TEST_COMPILER_CLANG |
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| 26 | static_assert(_LIBCPP_ALIGNOF(T) == _Alignof(T), "" ); |
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| 27 | #endif |
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| 28 | } |
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| 29 | |
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| 30 | int main(int, char**) { |
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| 31 | test<int>(); |
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| 32 | test<long long>(); |
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| 33 | test<double>(); |
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| 34 | test<long double>(); |
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| 35 | return 0; |
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| 36 | } |
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| 37 | |
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