[PATCH] D33916: RenameIndependentSubregs: Fix handling of undef tied operands

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
Herald added subscribers: nhaehnle, wdng.

If a tied source operand was undef, it would be replaced but not
update the other tied operand, which would end up using different
virtual registers.


https://reviews.llvm.org/D33916

Files:
  lib/CodeGen/RenameIndependentSubregs.cpp
  test/CodeGen/AMDGPU/rename-independent-subregs-invalid-mac-operands.mir

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