[PATCH] D55444: AMDGPU: Fix DPP combiner

[Valery Pykhtin via Phabricator via llvm-commits]

vpykhtin updated this revision to Diff 183315.
vpykhtin added a comment.

Fixed issue with old = dpp src register when bound ctrl is off.

Slightly refactored and simplified. Description is corrected, though it's not one-to-one maps on the code as there're other things to do (as reusing IMPLICIT_DEF instructions)

Variable names changed to be more consistent with the description.

I decided to left current commutation as is because it doesn't come for free: it may create new instructions (at least reversed instructions) and for that reason previous analisys (like SlotIndexes) should be invalidated.


Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D55444/new/

https://reviews.llvm.org/D55444

Files:
  include/llvm/CodeGen/TargetInstrInfo.h
  lib/Target/AMDGPU/GCNDPPCombine.cpp
  lib/Target/AMDGPU/SIInstrInfo.cpp
  lib/Target/AMDGPU/SIInstrInfo.h
  test/CodeGen/AMDGPU/dpp_combine.ll
  test/CodeGen/AMDGPU/dpp_combine.mir
  test/CodeGen/AMDGPU/dpp_combine_subregs.mir

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