[cfe-dev] Ask for CUDA supports in Clang

[Jingyue Wu]

Eli,

Lacking of real support for threadIdx, blockIdx, etc. may be fine for
Pengcheng (?) because he's doing CUDA->AST->CUDA transformation.

Jingyue

On Mon Oct 06 2014 at 3:21:11 PM Eli Bendersky <eliben at google.com> wrote:

> On Mon, Oct 6, 2014 at 11:25 AM, lipengcheng <pli at cs.rochester.edu> wrote:
>
>> Thanks, Eli.
>>
>> May I know what your initial support is? Can you please open it to me?
>> I don’t need too strong CUDA support, say generating CUDA code to LLVM
>> IR. What I only need to do is to parse CUDA code to Clang AST, and then
>> translate it back .
>>
>>
> So this part should already work, if you're careful. The main missing
> parts for just parsing the CUDA source into the AST are:
>
> 1. Real support for the threadIdx, blockIdx, etc. special globals
> 2. Various header definitions for __global__ & friends, CUDA builtins, etc.
>
> If all you need is to *parse*, then a simple header like
> https://gist.github.com/eliben/b014ac17cbe5a452803f should do the trick.
>
> Then you can do:
>
> $ clang  -cc1 -ast-dump -x cuda  -include <path-to-header-file-in-gist>
> cuda-input-file.cu
>
> And this should dump the AST. If you need to support more CUDA builtins
> (and/or runtime functions), you should add them to the header, *or* try to
> get Clang to parse the NVIDIA CUDA headers.
>
> Eli
>
>
>
>
>
>
>
>
>
>
>> Thanks,
>> Pengcheng
>>
>> On Oct 6, 2014, at 12:34 PM, Eli Bendersky <eliben at google.com> wrote:
>>
>>
>>
>> On Mon, Oct 6, 2014 at 6:40 AM, lipengcheng <pli at cs.rochester.edu
>> <https://urldefense.proofpoint.com/v1/url?u=http://mailto:pli%40cs.rochester.edu&k=p4Ly7qpEBiYPBVenR9G2iQ%3D%3D%0A&r=8jiWUOA7YNYuE%2FO4heswhF5KaS3dN4VEfeX8hooBpaw%3D%0A&m=Ndab2z%2B8lUH2UWs3LWtnM9Cai6wVRsOxorwsUutFIqM%3D%0A&s=b573ee104d18abf760999f0d33766404caaf2d891bf0bcb90fd60c8cadd7232b>
>> > wrote:
>>
>>> > Hi there,
>>> >
>>> > May I ask what’s the status of supporting CUDA on Clang?
>>> > Are there any incomplete patches to use for CUDA? I am doing
>>> > a source-to-source translation work for CUDA based on Clang.
>>> >
>>> > Thanks,
>>> > Pengcheng
>>>
>>>
>> Hi Pengcheng,
>>
>> CUDA is still only partially supported. This has been discussed a few
>> times this year:
>>
>> http://lists.cs.uiuc.edu/pipermail/cfe-dev/2014-September/038979.html
>> <https://urldefense.proofpoint.com/v1/url?u=http://lists.cs.uiuc.edu/pipermail/cfe-dev/2014-September/038979.html&k=p4Ly7qpEBiYPBVenR9G2iQ%3D%3D%0A&r=8jiWUOA7YNYuE%2FO4heswhF5KaS3dN4VEfeX8hooBpaw%3D%0A&m=Ndab2z%2B8lUH2UWs3LWtnM9Cai6wVRsOxorwsUutFIqM%3D%0A&s=49732052e1fd12cadb980beea32db56ab3523a57d889cf839753864eed1a8b28>
>> http://lists.cs.uiuc.edu/pipermail/cfe-dev/2014-March/035782.html
>> <https://urldefense.proofpoint.com/v1/url?u=http://lists.cs.uiuc.edu/pipermail/cfe-dev/2014-March/035782.html&k=p4Ly7qpEBiYPBVenR9G2iQ%3D%3D%0A&r=8jiWUOA7YNYuE%2FO4heswhF5KaS3dN4VEfeX8hooBpaw%3D%0A&m=Ndab2z%2B8lUH2UWs3LWtnM9Cai6wVRsOxorwsUutFIqM%3D%0A&s=4e85032739b5ab7b3bc84963f894a88d40ccd6d71b27630a6b17221e44aec8ee>
>>
>> Things haven't changed significantly since then. Patches welcome!
>> Eli
>>
>>
>>
>>
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