[PATCH] D118138: [AMDGPU][GlobalISel] Combine unmerge of undef

[Sebastian Neubauer via Phabricator via llvm-commits]

sebastian-ne created this revision.
sebastian-ne added reviewers: arsenm, foad, paquette.
Herald added subscribers: kerbowa, hiraditya, t-tye, tpr, dstuttard, rovka, yaxunl, jvesely, kzhuravl.
sebastian-ne requested review of this revision.
Herald added subscribers: llvm-commits, wdng.
Herald added a project: LLVM.

Fold (unmerge undef) -> undef, undef, ...


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D118138

Files:
  llvm/include/llvm/CodeGen/GlobalISel/CombinerHelper.h
  llvm/include/llvm/Target/GlobalISel/Combine.td
  llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
  llvm/test/CodeGen/AMDGPU/GlobalISel/call-outgoing-stack-args.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/postlegalizer-combiner-unmerge-undef.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/postlegalizercombiner-select.mir

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