Is llvm-propeller still alive?

[TobyGao]

Hi,
After reading propeller RFC, I found it is an amazing work which really help optimization a lot.
However, After I cloned this repository with its default branch(bb-clusters) and did some experiments.
I don't found it doing something special just like RFC says...
Also, I found you deleted lots of propeller-depended code in the commit 2429f12.
I'm curious about this project status.
Could you kindly give some explanation or some advices for starting testing this project (start from which branch? and what difference between those branches?)

[jiridanek]

The RFC document has disappeared from https://github.com/google/llvm-propeller/blob/plo-dev/Propeller_RFC.pdf

There is ACM article published January 2023, https://dl.acm.org/doi/10.1145/3575693.3575727

There is significant amount of code already merged into LLVM for a long time, for example llvm/llvm-project@9431787

Searching for "propeller" in LLVM gerrit gives some recent results for things still open, https://reviews.llvm.org/search/query/RQ37lBFY6kXp

One of the CLs is this, where the author says that clang itself can be optimized with propeller, https://reviews.llvm.org/D140252

I measured a 20% performance speedup in building clang using a Propeller optimized clang.

As far as I can tell, this thing seems to be ongoing.

[jiridanek]

And, here's folks that managed to archive the RFC for future reference, https://www.reddit.com/r/rust/comments/yeunrs/comment/iu18t19/?utm_source=reddit&utm_medium=web2x&context=3

Propeller_RFC.html.zip