[PATCH] D34300: [AMDGPU] simplify add x, *ext (setcc) => addc|subb x, 0, setcc

[Stanislav Mekhanoshin via Phabricator via llvm-commits]

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

This simplification allows to avoid generating v_cndmask_b32 to serialize condition code between compare and use.


Repository:
  rL LLVM

https://reviews.llvm.org/D34300

Files:
  lib/Target/AMDGPU/AMDGPUISelLowering.cpp
  lib/Target/AMDGPU/AMDGPUISelLowering.h
  lib/Target/AMDGPU/AMDGPUInstrInfo.td
  lib/Target/AMDGPU/SIISelLowering.cpp
  lib/Target/AMDGPU/SIISelLowering.h
  lib/Target/AMDGPU/VOP2Instructions.td
  test/CodeGen/AMDGPU/combine-cond-add-sub.ll

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