llvm dev - Dec 2016 - llvm/cuda: Indentify kernel functions and optimizations

Hi,

I am trying to instrument CUDA kernel functions only (llvm-3.9.0).

Is there a way to identify cuda kernel functions?

I see that in llvm IR for CUDA has nvvm annotations section, where kernel
functions are identified for NVPTX usage. I can parse the whole IR for this
kernel metadata and then proceed, but this is very clumsy.

Other way is to work with cuda-device-only IR. But then I am not sure how
to run this cuda-only-IR, as this contains cuda-device specific code and
not rest of the host-device code.

In NVPTXBaseInfo.h, the function attributes are defined, along
with PROPERTY_ISKERNEL_FUNCTION. How can this be used to identify the
kernel function?

Thanks.

-Gurunath
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https://github.com/llvm-mirror/llvm/blob/652375a8cc49615de31fd9d424753795059185b6/lib/Target/NVPTX/NVPTXUtilities.h#L58

Does this solve your problem?

On Wed, Dec 21, 2016 at 2:29 PM, Gurunath Kadam via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> Hi,
>
> I am trying to instrument CUDA kernel functions only (llvm-3.9.0).
>
> Is there a way to identify cuda kernel functions?
>
> I see that in llvm IR for CUDA has nvvm annotations section, where kernel
> functions are identified for NVPTX usage. I can parse the whole IR for this
> kernel metadata and then proceed, but this is very clumsy.
>
> Other way is to work with cuda-device-only IR. But then I am not sure how
> to run this cuda-only-IR, as this contains cuda-device specific code and
> not rest of the host-device code.
>
> In NVPTXBaseInfo.h, the function attributes are defined, along
> with PROPERTY_ISKERNEL_FUNCTION. How can this be used to identify the
> kernel function?
>
> Thanks.
>
> -Gurunath
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
>
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Hi Jingyue,

Thank should work! :)

Also, next time I will check the available resources in NVPTX before
posting here!

Thanks.

-Gurunath

On Wed, Dec 21, 2016 at 6:13 PM, Jingyue Wu <jingyue at google.com> wrote:
> https://github.com/llvm-mirror/llvm/blob/652375a8cc49615de31fd9d4247537
> 95059185b6/lib/Target/NVPTX/NVPTXUtilities.h#L58
>
> Does this solve your problem?
>
> On Wed, Dec 21, 2016 at 2:29 PM, Gurunath Kadam via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
>
>> Hi,
>>
>> I am trying to instrument CUDA kernel functions only (llvm-3.9.0).
>>
>> Is there a way to identify cuda kernel functions?
>>
>> I see that in llvm IR for CUDA has nvvm annotations section, where
kernel
>> functions are identified for NVPTX usage. I can parse the whole IR for
this
>> kernel metadata and then proceed, but this is very clumsy.
>>
>> Other way is to work with cuda-device-only IR. But then I am not sure
how
>> to run this cuda-only-IR, as this contains cuda-device specific code
and
>> not rest of the host-device code.
>>
>> In NVPTXBaseInfo.h, the function attributes are defined, along
>> with PROPERTY_ISKERNEL_FUNCTION. How can this be used to identify the
>> kernel function?
>>
>> Thanks.
>>
>> -Gurunath
>>
>> _______________________________________________
>> LLVM Developers mailing list
>> llvm-dev at lists.llvm.org
>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>
>>
>
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