[PATCH] D40155: AMDGPU: Fix breaking SMEM clauses

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
Herald added subscribers: t-tye, tpr, dstuttard, yaxunl, nhaehnle, wdng, kzhuravl.

This was completely ignoring subregisters,
so was not very useful. Also only break them
if xnack is actually enabled.


https://reviews.llvm.org/D40155

Files:
  lib/Target/AMDGPU/GCNHazardRecognizer.cpp
  lib/Target/AMDGPU/GCNHazardRecognizer.h
  test/CodeGen/AMDGPU/break-smem-soft-clauses.mir
  test/CodeGen/AMDGPU/immv216.ll
  test/CodeGen/AMDGPU/insert_vector_elt.v2i16.ll
  test/CodeGen/AMDGPU/llvm.amdgcn.div.fixup.f16.ll
  test/CodeGen/AMDGPU/use-sgpr-multiple-times.ll

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