[all-commits] [llvm/llvm-project] eb7491: [AMDGPU] Reimplement the GFX11 early release VGPRs...

[Jay Foad via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: eb7491769a511476ffae596a8f58abfd12ed46d4
      https://github.com/llvm/llvm-project/commit/eb7491769a511476ffae596a8f58abfd12ed46d4
  Author: Jay Foad <jay.foad at amd.com>
  Date:   2023-06-19 (Mon, 19 Jun 2023)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPU.h
    R llvm/lib/Target/AMDGPU/AMDGPUReleaseVGPRs.cpp
    M llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
    M llvm/lib/Target/AMDGPU/CMakeLists.txt
    M llvm/lib/Target/AMDGPU/SIInsertWaitcnts.cpp
    M llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.global.atomic.csub.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.image.atomic.dim.ll
    M llvm/test/CodeGen/AMDGPU/call-argument-types.ll
    M llvm/test/CodeGen/AMDGPU/cc-update.ll
    M llvm/test/CodeGen/AMDGPU/llc-pipeline.ll
    M llvm/test/CodeGen/AMDGPU/llvm.amdgcn.s.buffer.load.ll
    R llvm/test/CodeGen/AMDGPU/release-vgprs.mir
    M llvm/test/CodeGen/AMDGPU/waitcnt-preexisting-vscnt.mir

  Log Message:
  -----------
  [AMDGPU] Reimplement the GFX11 early release VGPRs optimization

Implement this optimization in SIInsertWaitcnts, where we already have
information about whether there might be outstanding VMEM store
instructions. This has the following advantages:
- Correctly handles atomics-with-return.
- Correctly handles call instructions.
- Should be faster because it does not require running a separate pass.

Differential Revision: https://reviews.llvm.org/D153279