[PATCH] D103348: [AMDGPU] Add maximum NSA size limit ISA feature

[Carl Ritson via Phabricator via llvm-commits]

critson created this revision.
critson added reviewers: foad, rampitec, arsenm.
Herald added subscribers: wenlei, kerbowa, hiraditya, t-tye, tpr, dstuttard, yaxunl, nhaehnle, jvesely, kzhuravl.
critson requested review of this revision.
Herald added subscribers: llvm-commits, wdng.
Herald added a project: LLVM.

Add maximum NSA size limit as an ISA feature.
Use this to reduce NSA usage on GFX10.1 to avoid stability issues
with 4 and 5 dwords NSA instructions.
Maintain use of longer NSA instructions on GFX10.3.

Note: this also contains some minor fixes for GlobalISel which
did not work correctly with non-NSA form instructions on GFX10.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D103348

Files:
  llvm/lib/Target/AMDGPU/AMDGPU.td
  llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
  llvm/lib/Target/AMDGPU/AMDGPUSubtarget.cpp
  llvm/lib/Target/AMDGPU/GCNSubtarget.h
  llvm/lib/Target/AMDGPU/SIISelLowering.cpp
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.sample.a16.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.sample.g16.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.image.sample.g16.ll
  llvm/test/CodeGen/AMDGPU/cluster_stores.ll
  llvm/test/CodeGen/AMDGPU/llvm.amdgcn.image.nsa.ll
  llvm/test/CodeGen/AMDGPU/llvm.amdgcn.image.sample.a16.dim.ll
  llvm/test/CodeGen/AMDGPU/llvm.amdgcn.image.sample.dim.ll
  llvm/test/CodeGen/AMDGPU/llvm.amdgcn.image.sample.g16.a16.dim.ll
  llvm/test/CodeGen/AMDGPU/llvm.amdgcn.image.sample.g16.encode.ll
  llvm/test/CodeGen/AMDGPU/llvm.amdgcn.image.sample.g16.ll

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