[all-commits] [llvm/llvm-project] e75f58: [AMDGPU] Relax lds dma waitcnt with no aliasing pa...

[Austin Kerbow via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e75f586b813a081cffcafb8b5d34b5547e52e548
      https://github.com/llvm/llvm-project/commit/e75f586b813a081cffcafb8b5d34b5547e52e548
  Author: Austin Kerbow <Austin.Kerbow at amd.com>
  Date:   2025-03-24 (Mon, 24 Mar 2025)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIInsertWaitcnts.cpp
    M llvm/test/CodeGen/AMDGPU/lds-dma-waits.ll

  Log Message:
  -----------
  [AMDGPU] Relax lds dma waitcnt with no aliasing pair (#131842)

If we cannot find any lds DMA instruction that is aliased by some load
from lds, we will still insert vmcnt(0). This is overly cautious since
handling inter-thread dependences is normally managed by the memory
model instead of the waitcnt pass, so this change updates the behavior
to be more inline with how other types of memory events are handled.



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