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Author SHA1 Message Date
Andrew Trick 2afa325811 When SCEV can determine the loop test is X < X, set ExactBECount=0. 
When ExactBECount is a constant, use it for MaxBECount.
When MaxBECount cannot be computed, replace it with ExactBECount.
Fixes PR9424.

llvm-svn: 127342
 2011-03-09 17:29:58 +00:00