[PATCH] D72332: AMDGPU/GlobalISel: Custom legalize v2s16 G_SHUFFLE_VECTOR

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: kerbowa, nhaehnle, tstellar.
Herald added subscribers: Petar.Avramovic, hiraditya, t-tye, tpr, dstuttard, rovka, yaxunl, wdng, jvesely, kzhuravl.
Herald added a project: LLVM.

Try to keep simple v2s16 cases as-is. This will more naturally map to
how the VOP3P op_sel modifiers work compared to the expansion
involving bitcasts and bitshifts.

      

This could maybe try harder with wider source vector types, although
that could be handled with a pre-legalize combine.


https://reviews.llvm.org/D72332

Files:
  llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
  llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.h
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-shuffle-vector.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-shuffle-vector.s16.mir

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