[PATCH] D120544: [AMDGPU] Omit unnecessary waitcnt before barriers

[Austin Kerbow via Phabricator via llvm-commits]

kerbowa updated this revision to Diff 412935.
kerbowa marked an inline comment as done.
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Update test to use -mattr.

Forgot that there is a bug (feature?) where disabling a feature that
is in a "SubtargetFeatureGeneration" class disables ALL of the
features in that definition. Add BackOffBarrier to each gfx10
definition individually so that I can use -mattr in the test.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D120544/new/

https://reviews.llvm.org/D120544

Files:
  llvm/lib/Target/AMDGPU/AMDGPU.td
  llvm/lib/Target/AMDGPU/GCNSubtarget.h
  llvm/lib/Target/AMDGPU/SIInsertWaitcnts.cpp
  llvm/test/CodeGen/AMDGPU/back-off-barrier-subtarget-feature.ll
  llvm/test/CodeGen/AMDGPU/waitcnt-preexisting-vscnt.mir
  llvm/test/CodeGen/AMDGPU/waitcnt-vscnt.ll

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