[LLVMdev] Supporting heterogeneous computing in llvm.

[Christos Margiolas]

Hi Dibyendu,

The design is quite modular. It can support offloading for serial
execution, vectorized execution or parallel execution. I will provide more
details soon.

--chris

On Thu, Jun 4, 2015 at 10:17 PM, Das, Dibyendu <Dibyendu.Das at amd.com> wrote:

>  Hi Chris-
>
>
>
> Are you offloading the vectorizable loops or are you looking at auto-par
> loops also ?
>
>
>
> -Thx
>
> Dibyendu
>
>
>
>
>
>
>
> *From:* llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] *On
> Behalf Of *Christos Margiolas
> *Sent:* Friday, June 05, 2015 6:05 AM
> *To:* LLVM Developers Mailing List
> *Subject:* [LLVMdev] Supporting heterogeneous computing in llvm.
>
>
>
> Hello All,
>
>
>
> The last two months I have been working on the design and implementation
> of a heterogeneous execution engine for LLVM. I started this project as an
> intern at the Qualcomm Innovation Center and I believe it can be useful to
> different people and use cases. I am planning to share more details and a
> set of patches in the next
>
> days. However, I would first like to see if there is an interest for this.
>
>
>
> The project is about providing compiler and runtime support for the
> automatic and transparent offloading of loop or function workloads to
> accelerators.
>
>
>
> It is composed of the following:
>
> a) Compiler and Transformation Passes for extracting loops or functions
> for offloading.
>
> b) A runtime library that handles scheduling, data sharing and coherency
> between the
>
> host and accelerator sides.
>
> c) A modular codebase and design. Adaptors specialize the code
> transformations for the target accelerators. Runtime plugins manage the
> interaction with the different accelerator environments.
>
>
>
> So far, this work so far supports the Qualcomm DSP accelerator  but I am
> planning to extend it to support OpenCL accelerators. I have also developed
> a debug port where I can test the passes and the runtime without requiring
> an accelerator.
>
>
>
>
>
> The project is still in early R&D stage and I am looking forward for
> feedback and to gauge  the interest level. I am willing to continue working
> on this as an open source project and bring it to the right shape so it can
> be merged with the LLVM tree.
>
>
>
>
>
> Regards,
>
> Chris
>
>
>
> P.S. I intent to join the llvm social in Bay Area tonight and I will be
> more than happy to talk about it.
>
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