[PATCH] D146523: [AMDGPU]: Add new intrinsic llvm.amdgcn.convergent.copy

[Jay Foad via Phabricator via llvm-commits]

foad added a comment.

In D146523#4210843 <https://reviews.llvm.org/D146523#4210843>, @b-sumner wrote:

> FWIW, there is no desire to read from inactive lanes.  The loop is supposed to only be reading from, and writing to, lanes that were active before the for loop is executed by a select single lane.

Then I'm back to not understanding what this convergent copy is for. I'd need to see a more complete example.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D146523/new/

https://reviews.llvm.org/D146523