1//===--- AlignedAllocation.h - Aligned Allocation ---------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8///
9/// \file
10/// Defines a function that returns the minimum OS versions supporting
11/// C++17's aligned allocation functions.
12///
13//===----------------------------------------------------------------------===//
14
15#ifndef LLVM_CLANG_BASIC_ALIGNED_ALLOCATION_H
16#define LLVM_CLANG_BASIC_ALIGNED_ALLOCATION_H
17
18#include "llvm/ADT/Triple.h"
19#include "llvm/Support/ErrorHandling.h"
20#include "llvm/Support/VersionTuple.h"
21
22namespace clang {
23
24inline llvm::VersionTuple alignedAllocMinVersion(llvm::Triple::OSType OS) {
25 switch (OS) {
26 default:
27 break;
28 case llvm::Triple::Darwin:
29 case llvm::Triple::MacOSX: // Earliest supporting version is 10.14.
30 return llvm::VersionTuple(10U, 14U);
31 case llvm::Triple::IOS:
32 case llvm::Triple::TvOS: // Earliest supporting version is 11.0.0.
33 return llvm::VersionTuple(11U);
34 case llvm::Triple::WatchOS: // Earliest supporting version is 4.0.0.
35 return llvm::VersionTuple(4U);
36 case llvm::Triple::ZOS:
37 return llvm::VersionTuple(); // All z/OS versions have no support.
38 }
39
40 llvm_unreachable("Unexpected OS");
41}
42
43} // end namespace clang
44
45#endif // LLVM_CLANG_BASIC_ALIGNED_ALLOCATION_H
46