[LLVMdev] Supporting heterogeneous computing in llvm.

[Gerolf Hoflehner]

Hi,

I can see even the homogenous variant of this to be useful. Just having the capability of extracting loops and wrapping them into functions and/or modules could help speeding up performance analysis and experiments. It would also help with testing the basic infrastructure + heterogenous environments.


Cheers
Gerolf

> On Jun 4, 2015, at 5:35 PM, Christos Margiolas <chrmargiolas at gmail.com> wrote:
> 
> 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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