[PATCH] D65267: [MachineCopyPropagation] Remove redundant copies after TailDup via machine-cp

[Kai Luo via Phabricator via llvm-commits]

lkail updated this revision to Diff 219284.
lkail added a comment.

Check if `SrcOp` is tied or an implicit-def.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D65267/new/

https://reviews.llvm.org/D65267

Files:
  llvm/lib/CodeGen/MachineCopyPropagation.cpp
  llvm/test/CodeGen/PowerPC/redundant-copy-after-tail-dup.ll
  llvm/test/CodeGen/X86/mul-i512.ll
  llvm/test/CodeGen/X86/umulo-128-legalisation-lowering.ll

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