[PATCH] D125378: [Attribute] Introduce shuffle attribute to be used for __shfl_sync like cross-lane APIs

[Nikita Popov via Phabricator via cfe-commits]

nikic requested changes to this revision.
nikic added a comment.
This revision now requires changes to proceed.

Please specify the semantics of the new LLVM attribute in LangRef -- though I 
don't really understand why you need an LLVM-side attribute at all.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D125378/new/

https://reviews.llvm.org/D125378

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