[PATCH] D121437: [AMDGPU] Add s_nop WaitStates between neighboring mfma

[Austin Kerbow via Phabricator via llvm-commits]

kerbowa created this revision.
kerbowa added reviewers: rampitec, arsenm, foad.
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In some cases padding bubbles between sequential MFMA instructions may
lead to increased inter-wave performance. Add option to request to pad
some portion of these stall cycles with s_nops.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D121437

Files:
  llvm/lib/Target/AMDGPU/GCNHazardRecognizer.cpp
  llvm/lib/Target/AMDGPU/GCNHazardRecognizer.h
  llvm/test/CodeGen/AMDGPU/neighboring-mfma-padding.mir

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