[PATCH] D55444: AMDGPU: Fix DPP combiner

[Valery Pykhtin via Phabricator via llvm-commits]

vpykhtin updated this revision to Diff 178878.
vpykhtin added a comment.

Fixed issue with identity values and other cases, f32/f16 identity values to be added later.

fma/mac instructions is disabled for now.

Test is fully reworked, added comments.

Connor, can you please take a look at the test in this update (first half) - I described different cases to combine there and possibly run the patch on radv test (the pass has to be switched on manually).

The pass is still disabled by default.


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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