[all-commits] [llvm/llvm-project] c3cbf1: [AMDGPU] GFX12 VMEM instructions can write VGPR re...

[Jay Foad via All-commits]

  Branch: refs/heads/users/foad/vmem-write-vgpr-in-order_split
  Home:   https://github.com/llvm/llvm-project
  Commit: c3cbf1843db8cebfc916ea590539bbf668f615f7
      https://github.com/llvm/llvm-project/commit/c3cbf1843db8cebfc916ea590539bbf668f615f7
  Author: Jay Foad <jay.foad at amd.com>
  Date:   2024-08-22 (Thu, 22 Aug 2024)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPU.td
    M llvm/lib/Target/AMDGPU/GCNSubtarget.h
    M llvm/lib/Target/AMDGPU/SIInsertWaitcnts.cpp
    M llvm/test/CodeGen/AMDGPU/buffer-fat-pointer-atomicrmw-fadd.ll
    M llvm/test/CodeGen/AMDGPU/buffer-fat-pointer-atomicrmw-fmax.ll
    M llvm/test/CodeGen/AMDGPU/buffer-fat-pointer-atomicrmw-fmin.ll
    M llvm/test/CodeGen/AMDGPU/llvm.amdgcn.struct.buffer.load.format.v3f16.ll
    M llvm/test/CodeGen/AMDGPU/load-constant-i16.ll
    M llvm/test/CodeGen/AMDGPU/load-global-i16.ll
    M llvm/test/CodeGen/AMDGPU/load-global-i32.ll
    M llvm/test/CodeGen/AMDGPU/spill-csr-frame-ptr-reg-copy.ll
    M llvm/test/CodeGen/AMDGPU/waitcnt-vmcnt-loop.mir

  Log Message:
  -----------
  [AMDGPU] GFX12 VMEM instructions can write VGPR results out of order

Fix SIInsertWaitcnts to account for this by adding extra waits to avoid
WAW dependencies.



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