llvm-project

46762421 - AMDGPU/GFX12: Do not wait unnecessarily before barriers (#154970)

AMDGPU/GFX12: Do not wait unnecessarily before barriers (#154970) The barrier intrinsic itself should not have memory semantics. Frontends should use appropriate fence instructions for memory effects, and some frontends want to rely on that for performance (e.g. wait only for LDS before a barrier). See the code comment for more detail.