[PATCH] D33697: [AntiDepBreaker] Revert r299124 and add a test.

[Tim Shen via Phabricator via llvm-commits]

timshen created this revision.
Herald added a subscriber: nemanjai.

AntiDepBreaker intends to add all live-outs, including the implicit
CSRs, in StartBlock. r299124 was done without understanding that
intention.

Now with the live-ins propagated correctly (https://reviews.llvm.org/D32464), we can revert this change.

I didn't use a mir test case, because -stop-before=if-converter +
-run-pass=if-converter doesn't produce the same result as
-stop-after=if-converter, and I'm not sure why.


https://reviews.llvm.org/D33697

Files:
  llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp
  llvm/lib/CodeGen/CriticalAntiDepBreaker.cpp
  llvm/test/CodeGen/PowerPC/if-converter-split-liveins.ll
  llvm/test/CodeGen/PowerPC/pristine-and-livein.mir

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