[llvm] [AMDGPU] Add amdgpu-lower-special-lds pass to lower named-barrier LDS (PR #165692)

[via llvm-commits]

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+//===-- AMDGPULowerSpecialLDS.cpp -----------------------------------------===//
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skc7 wrote:

"amdgpu-lower-sync-lds" Could be used?

Sync here relates to synchronization primitives.

https://github.com/llvm/llvm-project/pull/165692