[PATCH] Enable atomics on Bitrig+arm

[Rafael Espíndola]

Needs a testcase. OK with it.

On 16 June 2013 16:05, Patrick Wildt <mail at patrick-wildt.de> wrote:
> Hi,
>
> as of r184040, atomics on ARM were enabled for FreeBSD.  Bitrig also suffers
> the issue, therefore I've attached a patch which enables those for Bitrig.
>
> I'd like to ask you to commit it.
>
> Thanks in advance,
> Patrick Wildt
>
> --- lib/Basic/Targets.cpp.orig  Sun Jun 16 21:08:39 2013
> +++ lib/Basic/Targets.cpp       Sun Jun 16 21:20:01 2013
> @@ -3534,7 +3534,9 @@ class ARMTargetInfo : public TargetInfo {
>      // the kernel which on armv6 and newer uses ldrex and strex. The net result
>      // is that if we assume the kernel is at least as recent as the hardware,
>      // it is safe to use atomic instructions on armv6 and newer.
> -    if (T.getOS() != llvm::Triple::Linux && T.getOS() != llvm::Triple::FreeBSD)
> +    if (T.getOS() != llvm::Triple::Linux &&
> +        T.getOS() != llvm::Triple::FreeBSD &&
> +        T.getOS() != llvm::Triple::Bitrig)
>        return false;
>      StringRef ArchName = T.getArchName();
>      if (T.getArch() == llvm::Triple::arm) {
>
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