[PATCH] D46992: [AMDGPU] Add perf hints to functions

[Stanislav Mekhanoshin via Phabricator via llvm-commits]

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

This is adoption of HSAIL perfhint pass. Two types of hints are produced:

1. Function is memory bound.
2. Kernel can use wave limiter.

Currently these hints are used in the scheduler. If a function is suspected
to be memory bound we allow occupancy to decrease to 4 waves in the course
of scheduling.


https://reviews.llvm.org/D46992

Files:
  lib/Target/AMDGPU/AMDGPU.h
  lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp
  lib/Target/AMDGPU/AMDGPUAsmPrinter.h
  lib/Target/AMDGPU/AMDGPUPerfHint.cpp
  lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
  lib/Target/AMDGPU/CMakeLists.txt
  lib/Target/AMDGPU/GCNSchedStrategy.cpp
  lib/Target/AMDGPU/SIDefines.h
  lib/Target/AMDGPU/SIMachineFunctionInfo.cpp
  lib/Target/AMDGPU/SIMachineFunctionInfo.h
  test/CodeGen/AMDGPU/hsa-metadata-kernel-code-props.ll
  test/CodeGen/AMDGPU/perfhint.ll

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