[PATCH] D62132: [RFC] Intrinsics for Hardware Loops

[Markus Lavin via Phabricator via llvm-commits]

markus added a comment.

This is interesting. Our (Ericsson's) out-of-tree target has hardware loops and we currently do a similar thing i.e.

1. Use SCEV on IR to determine trip count and insert a hint intrinsic.
2. Iselect the hint 1:1.
3. Custom machine function pass picks it up and inserts a hardware loop instruction if sufficient conditions are satisfied.

So that said we would be happy to see generic support upstream and would likely convert to that once available.


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  https://reviews.llvm.org/D62132/new/

https://reviews.llvm.org/D62132