[PATCH] D147408: [AMDGPU] Iterative scan implementation for atomic optimizer.

[Jay Foad via Phabricator via llvm-commits]

foad added a comment.

> We need to enable atomic optimizer using `-amdgpu-atomic-optimizations=true` and then 
> we can use `-amdgpu-atomic-optimizer-strategy=DPP/Iterative` flag to select the strategy for scan (defaulted to DPP for now and will be changed to Iterative for compute pipeline once LLPC adapts to this change).
>
> This will allow LLPC to adjust to new change and then we can enable and default to Iterative strategy using only one flag -amdgpu-atomic-optimizer-strategy=DPP/Iterative
> and deprecate `-amdgpu-atomic-optimizations`

Here's the LLPC patch to set `-amdgpu-atomic-optimizer-strategy=DPP`: https://github.com/GPUOpen-Drivers/llpc/pull/2506


Repository:
  rG LLVM Github Monorepo

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https://reviews.llvm.org/D147408