[PATCH] D63225: AMDGPU: Fold readlane from copy of SGPR or imm

[Matt Arsenault via Phabricator via llvm-commits]

arsenm updated this revision to Diff 204380.
arsenm added a comment.

Check for exec def


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D63225/new/

https://reviews.llvm.org/D63225

Files:
  lib/Target/AMDGPU/SIFoldOperands.cpp
  lib/Target/AMDGPU/SIInstructions.td
  test/CodeGen/AMDGPU/fold-readlane.mir
  test/CodeGen/AMDGPU/llvm.amdgcn.readfirstlane.ll
  test/CodeGen/AMDGPU/llvm.amdgcn.readlane.ll

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