Anna Thomas dc935a6eb6 [LoopUnrollRuntime] Use SCEV exit count for calculating trip count. NFCI ...

Instead of getBackEdgeTakenCount, use getExitCount on the latch exiting block
(which is proven to be the only exiting block in the loop to be unrolled).

llvm-svn: 306410

2017-06-27 14:14:35 +00:00

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