1//===--- AlignedAllocation.h - Aligned Allocation ---------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9///
10/// \file
11/// \brief Defines a function that returns the minimum OS versions supporting
12/// C++17's aligned allocation functions.
13///
14//===----------------------------------------------------------------------===//
15
16#ifndef LLVM_CLANG_BASIC_ALIGNED_ALLOCATION_H
17#define LLVM_CLANG_BASIC_ALIGNED_ALLOCATION_H
18
19#include "clang/Basic/VersionTuple.h"
20#include "llvm/ADT/Triple.h"
21#include "llvm/Support/ErrorHandling.h"
22
23namespace clang {
24
25inline VersionTuple alignedAllocMinVersion(llvm::Triple::OSType OS) {
26  switch (OS) {
27  default:
28    break;
29  case llvm::Triple::Darwin:
30  case llvm::Triple::MacOSX: // Earliest supporting version is 10.13.
31    return VersionTuple(10U, 13U);
32  case llvm::Triple::IOS:
33  case llvm::Triple::TvOS: // Earliest supporting version is 11.0.0.
34    return VersionTuple(11U);
35  case llvm::Triple::WatchOS: // Earliest supporting version is 4.0.0.
36    return VersionTuple(4U);
37  }
38
39  llvm_unreachable("Unexpected OS");
40}
41
42} // end namespace clang
43
44#endif // LLVM_CLANG_BASIC_ALIGNED_ALLOCATION_H
45