[llvm-dev] PSLP: Padded SLP Automatic Vectorization
David Chisnall via llvm-dev
llvm-dev at lists.llvm.org
Tue Sep 29 05:37:39 PDT 2020
On 28/09/2020 15:45, Matt P. Dziubinski via llvm-dev wrote:
> Hey, I noticed this talk from the EuroLLVM 2015
> (https://llvm.org/devmtg/2015-04/slides/pslp_slides_EUROLLVM2015.pdf) on
> the PSLP vectorization algorithm (CGO 2015 paper:
> Is anyone working on implementing it?
> If so, are there Phab reviews I can subscribe to?
The CGO paper was based on a very old LLVM and the last I heard, moving
the transform to a newer LLVM and rerunning the benchmarks made the
speedups go away. It's not clear what the cause of this was and the
team responsible didn't have the time to do any root cause analysis.
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