[cfe-dev] [RFC] Introduce HIP language mode

[Tom Stellard via cfe-dev]

On 05/11/2018 07:03 AM, Liu, Yaxun (Sam) wrote:
> Yes. http://github.com/radeonopencompute/clang amd-hip-rebase branch.
> 

Thanks and can I use HIP from ROCm 1.8 with this branch or do I need
to use a different build of HIP?

-Tom

> Sam
> 
> -----Original Message-----
> From: Tom Stellard [mailto:tstellar at redhat.com] 
> Sent: Friday, May 11, 2018 1:32 AM
> To: Liu, Yaxun (Sam) <Yaxun.Liu at amd.com>; cfe-dev (cfe-dev at lists.llvm.org) <cfe-dev at lists.llvm.org>
> Cc: Tye, Tony <Tony.Tye at amd.com>; Sumner, Brian <Brian.Sumner at amd.com>
> Subject: Re: [cfe-dev] [RFC] Introduce HIP language mode
> 
> On 03/28/2018 12:29 PM, Liu, Yaxun (Sam) via cfe-dev wrote:
>> HIP is a language similar to CUDA (https://github.com/ROCm-Developer-Tools/HIP/blob/master/docs/markdown/hip_kernel_language.md  ).
>> The language syntax is very similar, which allows a hip program to be 
>> compiled as a CUDA program by Clang. The main difference is the host 
>> API. HIP has a set of vendor neutral host API which can be implemented on different platforms. Currently there is open source implementation of HIP runtime on amdgpu target (https://github.com/ROCm-Developer-Tools/HIP ).
>>
>> We have a working implementation of HIP compiler based on clang thanks 
>> to Greg Rodgers' work and we would like to upstream it. As an initial step, we created a Phabricator Review https://reviews.llvm.org/D44984 for adding support of file type hip and language option HIP.
>>
>> When hip file is compiled, both LangOpts.CUDA and LangOpts.HIP is 
>> turned on. This allows compilation of hip program as CUDA in most cases and only special handling of hip program is needed LangOpts.HIP is checked.
>>
>> This patch also adds support of kernel launching of HIP program using HIP host API.
>>
>> The next patch will be the toolchain changes to support HIP. Basically HIP has its own open source header files and device libraries which may be ported to different targets/platforms.
>>
>> We plan to continue upstreaming our support of HIP until it becomes mature enough to support major machine learning applications ported to HIP, e.g. TensorFlow https://github.com/ROCmSoftwarePlatform/tensorflow .
>> Any comments are welcome.
>>
> 
> Is there a public git repo with the patches you are pushing upstream?
> 
> -Tom
> 
>> Thanks.
>>
>> Yaxun (Sam) Liu
>>
>>
>>
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>