[PATCH] [MachineSink] Use the real post dominator tree

[Jiangning Liu]

Hi Jingyue,

My data is for performance only.

I think you can use llvm-test-suite to verify compile time CC_Time and CC_Real_Time. I just did this recently for my LVI patch.

Thanks,
-Jiangning

http://reviews.llvm.org/D4814