[PATCH] D73111: GlobalISel: Reimplement widenScalar for G_UNMERGE_VALUES results

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: dsanders, paquette, aditya_nandakumar, aemerson, kerbowa.
Herald added subscribers: Petar.Avramovic, volkan, hiraditya, rovka, nhaehnle, wdng, jvesely.
Herald added a project: LLVM.

Only use shifts if the requested type exactly matches the source type,
and create sub-unmerges otherwise.


https://reviews.llvm.org/D73111

Files:
  llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
  llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
  llvm/test/CodeGen/AArch64/GlobalISel/legalize-unmerge-values.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/artifact-combiner-unmerge-values.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-anyext.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-bitcast.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-merge-values.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-sext.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-unmerge-values.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-zext.mir

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