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36 lines
1.2 KiB
C++
36 lines
1.2 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// Check that the overloads of std::__libcpp_{isnan,isinf,isfinite} that take
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// floating-point values are evaluatable from constexpr contexts.
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//
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// These functions need to be constexpr in order to be called from CUDA, see
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// https://reviews.llvm.org/D25403. They don't actually need to be
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// constexpr-evaluatable, but that's what we check here, since we can't check
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// true constexpr-ness.
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//
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// This fails with gcc because __builtin_isnan and friends, which libcpp_isnan
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// and friends call, are not themselves constexpr-evaluatable.
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//
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// UNSUPPORTED: c++98, c++03
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// XFAIL: gcc
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#include <cmath>
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#include "test_macros.h"
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static_assert(std::__libcpp_isnan_or_builtin(0.) == false, "");
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static_assert(std::__libcpp_isinf_or_builtin(0.0) == false, "");
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static_assert(std::__libcpp_isfinite_or_builtin(0.0) == true, "");
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int main(int, char**)
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{
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return 0;
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}
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