[PATCH] D74863: AMDGPU/GlobalISel: Fix SALU mapping for v2s16 min/max

[Matt Arsenault via Phabricator via llvm-commits]

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

The legalizer helper functions are unusably awkward to perform the 3-5
part legalization. This needs to be widened, scalarized, lowered, and
we should avoid creating vector extends and truncates. Manually do all
of this and expand.


https://reviews.llvm.org/D74863

Files:
  llvm/lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp
  llvm/test/CodeGen/AMDGPU/GlobalISel/regbankselect-smax.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/regbankselect-smin.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/regbankselect-umax.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/regbankselect-umin.mir

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