PATCH: Add "noduplicate" property for intrinsics and use it NVPTX synchronization intrinsics

[Eli Bendersky]

On Tue, Mar 18, 2014 at 9:59 AM, Justin Holewinski
<jholewinski at nvidia.com>wrote:

>  This looks good to me, though sign-off from a maintainer of tablegen may
> be necessary.
>

+CC Bill (attributes) and Jakob


> This should be set for all barrier instructions in IntrinsicsNVVM.td.
>

Fair enough; updated patch attached.

Eli



>
>
> On 03/17/2014 05:09 PM, Eli Bendersky wrote:
>
> Hello,
>
>  The "noduplicate" function attribute exists to prevent certain
> optimizations from duplicating calls to the function. This is important on
> platforms where certain function call duplications are unsafe (for example
> execution barriers for CUDA and OpenCL).
>
>  This patch make it possible to specify intrinsics as "noduplicate" and
> translates that to the appropriate function attribute. It also uses it for
> the int_cuda_syncthreads intrinsics. Tests are also added.
>
>  Justin: for now I just added it for the intrinsic directly visible from
> CUDA source. Should this attribute be added to all int_nvvm_barrier0*
> intrinsics as well?
>
>  PTAL
>
>  Eli
>
>
>
>
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