llvm-project

cb8ce283 - [AMDGPU][Waitcnts] Don't create a pending flat event for LDS DMA (#170263)

[AMDGPU][Waitcnts] Don't create a pending flat event for LDS DMA (#170263) Flat instructions need a waitcnt(0) on both VMEM and LDS accesses, but only when the instruction really is using flat addressing. The LDS DMA instructions (on GFX9) have the FLAT flag set, but they have very clear semantics. These instructions update only VM_CNT (on GFX9), and hence do not need to be treated like actual flat instructions.