[PATCH] D29850: [AArch64] Fix bug in AArch64RedundantCopyElimination removing COPYs it shouldn't.

[Geoff Berry via Phabricator via llvm-commits]

gberry created this revision.
Herald added subscribers: rengolin, aemerson.

Don't remove COPYs with implicit defs, unless we know the implicitly
defined register is also zero.


https://reviews.llvm.org/D29850

Files:
  lib/Target/AArch64/AArch64RedundantCopyElimination.cpp
  test/CodeGen/AArch64/machine-copy-remove.mir

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