[llvm-dev] Using polly to change loop schedules in an llvm pass

[Johannes Doerfert via llvm-dev]

Hey Adel,

You don't have to go through json per-se but Polly's design also wasn't 
for the use case you describe.
I cc'ed Michael who has some extensions (I think) that allow the 
frontend to decide how to modify the schedule.
You should be able to piggy back on that either through IR annotations 
or direct calls of the appropriate functions
in Polly that modify the schedule tree.

Best of luck :)

~ Johannes



On 10/22/20 11:18 AM, Ejjeh, Adel via llvm-dev wrote:
> Hello All
>
> I am looking into using polly, in conjunction with a set of passes that I am writing, to modify loop schedules/transform loops. I was wondering if there is a way to interface with polly directly through an LLVM pass? It seems by looking at the documentation, that the way to modify loop schedules is to generate the jscop files, modify them, and then reload them with polly, which is not a very “friendly” mechanism to do automatically in a pass. Is my understanding of the usage of polly correct here, or am I missing something?
>
> Thanks!
> -Adel Ejjeh
> --
> Adel Ejjeh
> PhD Candidate | Computer Science
> University of Illinois at Urbana Champaign
> Email: aejjeh at illinois.edu<mailto:aejjeh at illinois.edu> | adel.ejjeh at gmail.com<mailto:adel.ejjeh at gmail.com>
> Zoom: https://illinois.zoom.us/my/aejjeh
>
>
>
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