[PATCH] D158063: [GISel][AArch64] Combine G_BUILD_VECTOR(G_UNMERGE) with undef elements

[Dave Green via Phabricator via llvm-commits]

dmgreen updated this revision to Diff 551937.
dmgreen edited the summary of this revision.
dmgreen added a comment.
Herald added subscribers: sunshaoce, kerbowa, jvesely.

OK - this now just removes the nodes. It does mean we lose information about which lanes are undef, but there are less instructions to deal with and we don't need to do it just when the shuffle is legal.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D158063/new/

https://reviews.llvm.org/D158063

Files:
  llvm/include/llvm/CodeGen/GlobalISel/LegalizationArtifactCombiner.h
  llvm/test/CodeGen/AArch64/fabs.ll
  llvm/test/CodeGen/AArch64/fcvt.ll
  llvm/test/CodeGen/AArch64/fminimummaximum.ll
  llvm/test/CodeGen/AArch64/fminmax.ll
  llvm/test/CodeGen/AArch64/fpext.ll
  llvm/test/CodeGen/AArch64/fptrunc.ll
  llvm/test/CodeGen/AArch64/fsqrt.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/andn2.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/bswap.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/fmul.v2f16.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/fshr.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-and.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-fshl.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-fshr.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.load.2d.d16.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.load.2d.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.store.2d.d16.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-or.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-select.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-shuffle-vector.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-vector-args-gfx8-plus.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-xor.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/orn2.ll

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