[PATCH] D61901: AMDGPU: Assume xnack is enabled by default

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: rampitec, t-tye, scott.linder.
Herald added subscribers: eraman, tpr, dstuttard, yaxunl, nhaehnle, wdng, jvesely, kzhuravl, qcolombet.

This is the conservatively correct default. It is always safe to
assume xnack is enabled, but not the converse.

      

Introduce a feature to blacklist targets where xnack can never be
meaningfully enabled. I'm not sure the targets this is applied to is
100% correct.


https://reviews.llvm.org/D61901

Files:
  lib/Target/AMDGPU/AMDGPU.td
  lib/Target/AMDGPU/AMDGPUSubtarget.cpp
  lib/Target/AMDGPU/AMDGPUSubtarget.h
  test/CodeGen/AMDGPU/break-vmem-soft-clauses.mir
  test/CodeGen/AMDGPU/spill-cfg-position.ll
  test/Transforms/Inline/AMDGPU/inline-target-feature-xnack.ll

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