ed61d6a466
The use_system_cxx_lib Lit feature was only used for back-deployment testing. However, one immense hole in that setup was that we didn't have a proper way to test Apple's own libc++ outside of back-deployment, which was embodied by the fact that we needed to define _LIBCPP_DISABLE_AVAILABILITY when testing (see change in libcxx/utils/libcxx/test/params.py). This led to the apple-system testing configuration not checking for availability markup, which is obviously quite bad since the library we ship actually has availability markup. Using stdlib=<VENDOR>-libc++ instead to encode back-deployment restrictions on tests is simpler and it makes it possible to naturally support tests such as availability markup checking even in the tip-of-trunk Apple-libc++ configuration. Differential Revision: https://reviews.llvm.org/D146366
48 lines
1.3 KiB
C++
48 lines
1.3 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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// UNSUPPORTED: c++03
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// Aligned allocations are not supported on macOS < 10.13
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// Note: use 'unsupported' instead of 'xfail' to ensure
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// we won't pass prior to c++17.
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// UNSUPPORTED: stdlib=apple-libc++ && target={{.+}}-apple-macosx10.{{9|10|11|12}}
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// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
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// <memory>
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// template <class T>
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// pair<T*, ptrdiff_t>
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// get_temporary_buffer(ptrdiff_t n);
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//
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// template <class T>
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// void
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// return_temporary_buffer(T* p);
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#include <cassert>
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#include <cstdint>
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#include <memory>
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#include <utility>
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#include "test_macros.h"
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struct alignas(32) A {
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int field;
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};
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int main(int, char**)
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{
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std::pair<A*, std::ptrdiff_t> ip = std::get_temporary_buffer<A>(5);
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assert(!(ip.first == nullptr) ^ (ip.second == 0));
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assert(reinterpret_cast<std::uintptr_t>(ip.first) % alignof(A) == 0);
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std::return_temporary_buffer(ip.first);
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return 0;
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}
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