[PATCH] D24609: [ARM] Add missing Interlocked intrinsics

[Martin Storsjö via cfe-commits]

mstorsjo created this revision.
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On ARM, there are multiple versions of each of the intrinsics, with acquire/relaxed/release barrier semantics.

The 64 bit versions that so far were within "ifdef __x86_64__" also are fit for arm - I think the reason why they were in ifdefs is that winnt.h have got inline versions of them for, within ifdef _M_IX86.

The versions without a width suffix (32 bit) are currently provided as builtins instead of as inline functions here. The _acq/_nf/_rel suffixed ones of those are provided as inline functions here, since they should only be available on certain archs (arm/aarch64).

This is necessary in order to compile C++ code for ARM in MSVC mode.

https://reviews.llvm.org/D24609

Files:
  lib/Headers/intrin.h

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