[PATCH] D85603: IR: Add convergence control operand bundle and intrinsics

[Vinod Grover via Phabricator via llvm-commits]

vgrover99 added a comment.

In D85603#2370634 <https://reviews.llvm.org/D85603#2370634>, @sameerds wrote:

> 



> This correctly covers `__syncthreads()`, and is a bit conservative about builtins that take a mask like `__syncwarp()`. In @jlebar's example, each call to `__syncwarp()` is a separate dynamic instance, although CUDA actually treats them as a single synchronization point.

Yes, in CUDA and in PTX `__syncwarp` is an unaligned primitive.


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  https://reviews.llvm.org/D85603/new/

https://reviews.llvm.org/D85603