[PATCH] D20531: MachineCopyPropagation: remove some more copys when they are not needed

[Jonas Paulsson via llvm-commits]

jonpa updated this revision to Diff 58596.
jonpa added a comment.

Patch updated according to review, and also added handling of a COPY's second implit-def with ClobberRegister().


http://reviews.llvm.org/D20531

Files:
  lib/CodeGen/MachineCopyPropagation.cpp

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