[PATCH] Add Clang support for intrinsic __rdpmc.

[Reid Kleckner]

lgtm


On Mon, Jun 30, 2014 at 10:47 AM, Andrea Di Biagio <
andrea.dibiagio at gmail.com> wrote:

> Hi,
>
> This patch adds Clang support for intrinsic __rdpmc in "ia32intrin.h".
> Intrinsic __rdpmc is implemented as a call to the x86 builtin
> '__builtin_ia32_rdpmc'.
> It takes as input a value representing the index of the performance
> counter to read.
> The value of the performance counter is then returned as an unsigned
> 64-bit quantity.
>
> LLVM support for builtin rdpmc has been committed already at revision
> 212049.
>
>
> Please let me know if ok to submit.
>
> Thanks!
> Andrea
>
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