[PATCH] D85521: GlobalISel: Handle zext(sext x) in artifact combiner

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: aemerson, paquette, dsanders.
Herald added subscribers: kerbowa, rovka, nhaehnle, jvesely.
Herald added a project: LLVM.
arsenm requested review of this revision.
Herald added a subscriber: wdng.

This eliminates the illegal intermediate s8 value in the added test.


https://reviews.llvm.org/D85521

Files:
  llvm/include/llvm/CodeGen/GlobalISel/LegalizationArtifactCombiner.h
  llvm/test/CodeGen/AMDGPU/GlobalISel/artifact-combiner-zext.mir

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