[all-commits] [llvm/llvm-project] 18f1c9: [AMDGPU] Avoid unneeded waitcounts before spill st...

[Stanislav Mekhanoshin via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 18f1c980bc924b5a4dd4caaf1c30add2f1f99961
      https://github.com/llvm/llvm-project/commit/18f1c980bc924b5a4dd4caaf1c30add2f1f99961
  Author: Stanislav Mekhanoshin <rampitec at users.noreply.github.com>
  Date:   2024-09-14 (Sat, 14 Sep 2024)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIInsertWaitcnts.cpp
    M llvm/test/CodeGen/AMDGPU/GlobalISel/vni8-across-blocks.ll
    M llvm/test/CodeGen/AMDGPU/agpr-copy-no-free-registers.ll
    M llvm/test/CodeGen/AMDGPU/collapse-endcf.ll
    M llvm/test/CodeGen/AMDGPU/div_i128.ll
    M llvm/test/CodeGen/AMDGPU/indirect-addressing-si.ll
    M llvm/test/CodeGen/AMDGPU/load-global-i16.ll
    M llvm/test/CodeGen/AMDGPU/load-global-i32.ll
    M llvm/test/CodeGen/AMDGPU/mubuf-legalize-operands-non-ptr-intrinsics.ll
    M llvm/test/CodeGen/AMDGPU/mubuf-legalize-operands.ll
    M llvm/test/CodeGen/AMDGPU/preserve-wwm-copy-dst-reg.ll
    M llvm/test/CodeGen/AMDGPU/rem_i128.ll
    M llvm/test/CodeGen/AMDGPU/sgpr-spills-split-regalloc.ll
    M llvm/test/CodeGen/AMDGPU/spill-offset-calculation.ll
    M llvm/test/CodeGen/AMDGPU/spill-scavenge-offset.ll
    A llvm/test/CodeGen/AMDGPU/spill-wait.mir
    M llvm/test/CodeGen/AMDGPU/vni8-across-blocks.ll
    M llvm/test/CodeGen/AMDGPU/wwm-reserved-spill.ll
    M llvm/test/CodeGen/AMDGPU/wwm-reserved.ll

  Log Message:
  -----------
  [AMDGPU] Avoid unneeded waitcounts before spill stores (#108303)

Implicit defs and uses on spill stores were accounted as real defs and
uses, while only exist for liveness accounting. As a result unneded
waits were generated.

Fixes: SWDEV-484177



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