[PATCH] D35523: [AMDGPU] refactor WQM pass in preparation for WWM (NFCI)

[Connor Abbott via Phabricator via llvm-commits]

cwabbott updated this revision to Diff 108710.
cwabbott added a comment.
Herald added a subscriber: mgorny.

- Fixed style issues.
- Rebased on using setDesc() in lowerCopyInstrs()
- Reworked logic for determining safe points to transition where SCC isn't live, to make using s_or_saveexec_b64 for entering WWM possible.
- Added tests for WWM across multiple basic blocks and correct SCC handling. For the latter, I couldn't figure out how to make an IR test that exercised that path, so I made a MIR test for it.


https://reviews.llvm.org/D35523

Files:
  include/llvm/IR/IntrinsicsAMDGPU.td
  lib/Target/AMDGPU/AMDGPU.h
  lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
  lib/Target/AMDGPU/CMakeLists.txt
  lib/Target/AMDGPU/SIFixSGPRCopies.cpp
  lib/Target/AMDGPU/SIFixWWMLiveness.cpp
  lib/Target/AMDGPU/SIISelLowering.cpp
  lib/Target/AMDGPU/SIInstrInfo.cpp
  lib/Target/AMDGPU/SIInstructions.td
  lib/Target/AMDGPU/SIWholeQuadMode.cpp
  test/CodeGen/AMDGPU/fix-wwm-liveness.mir
  test/CodeGen/AMDGPU/wqm.ll
  test/CodeGen/AMDGPU/wqm.mir

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