[all-commits] [llvm/llvm-project] 51e024: [AMDGPU] Produce waitcounts for LDS DMA

[Stanislav Mekhanoshin via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 51e02409f0220c796d34f72b3a4b8ba3d3f34cb9
      https://github.com/llvm/llvm-project/commit/51e02409f0220c796d34f72b3a4b8ba3d3f34cb9
  Author: Stanislav Mekhanoshin <Stanislav.Mekhanoshin at amd.com>
  Date:   2022-04-29 (Fri, 29 Apr 2022)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIInsertWaitcnts.cpp
    A llvm/test/CodeGen/AMDGPU/lds-dma-waitcnt.mir

  Log Message:
  -----------
  [AMDGPU] Produce waitcounts for LDS DMA

MUBUF and FLAT LDS DMA operations need a wait on vmcnt before LDS written
can be accessed. A load from LDS to VMEM does not need a wait.

Differential Revision: https://reviews.llvm.org/D124626