32 lines
1.1 KiB
C++
32 lines
1.1 KiB
C++
//===--- AlignOf.h - Portable calculation of type alignment -----*- 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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//
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// This file defines the AlignedCharArrayUnion class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_ALIGNOF_H
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#define LLVM_SUPPORT_ALIGNOF_H
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#include <algorithm>
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namespace llvm {
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/// A suitably aligned and sized character array member which can hold elements
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/// of any type.
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template <typename T, typename... Ts> struct AlignedCharArrayUnion {
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// Work around "internal compiler error: Segmentation fault" with GCC 7.5,
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// apparently caused by alignas(Ts...).
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static constexpr std::size_t Align = std::max({alignof(T), alignof(Ts)...});
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alignas(Align) char buffer[std::max({sizeof(T), sizeof(Ts)...})];
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};
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} // end namespace llvm
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#endif // LLVM_SUPPORT_ALIGNOF_H
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