[PATCH] D64436: GlobalISel: Combine unmerge of merge with intermediate cast

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: aemerson, aditya_nandakumar, paquette.
Herald added subscribers: Petar.Avramovic, volkan, rovka, nhaehnle, wdng, jvesely.

This eliminates some illegal intermediate vectors when operations are
scalarized.


https://reviews.llvm.org/D64436

Files:
  include/llvm/CodeGen/GlobalISel/LegalizationArtifactCombiner.h
  include/llvm/CodeGen/GlobalISel/Utils.h
  lib/CodeGen/GlobalISel/Utils.cpp
  test/CodeGen/AMDGPU/GlobalISel/artifact-combiner-unmerge-values.mir

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